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X-WR-CALNAME:Orange County Astronomers
X-ORIGINAL-URL:https://www.ocastronomers.org
X-WR-CALDESC:Events for Orange County Astronomers
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TZID:America/Los_Angeles
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DTSTART:20191103T090000
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DTSTART:20200308T100000
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TZNAME:PST
DTSTART:20201101T090000
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BEGIN:VEVENT
DTSTART;VALUE=DATE:20201221
DTEND;VALUE=DATE:20201222
DTSTAMP:20260409T140933
CREATED:20201123T191819Z
LAST-MODIFIED:20201123T220948Z
UID:10001041-1608508800-1608595199@www.ocastronomers.org
SUMMARY:First Quarter Moon
DESCRIPTION:Views: 2
URL:https://www.ocastronomers.org/calendar/first-quarter-moon/
CATEGORIES:Moon Phases
ATTACH;FMTTYPE=image/jpeg:https://www.ocastronomers.org/wp-content/uploads/2020/11/moon_1st-quarter.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201214T063000
DTEND;TZID=America/Los_Angeles:20201214T213000
DTSTAMP:20260409T140933
CREATED:20201211T194016Z
LAST-MODIFIED:20201211T194632Z
UID:10001062-1607927400-1607981400@www.ocastronomers.org
SUMMARY:Online Solar Eclipse
DESCRIPTION:The last solar eclipse of 2020 will be on Monday December 14th and is going to be only visible from Southern America. \nBehold that OCA in collaboration with Prof. Elizabeth Villanueva and her students from Colegio Alberto Pérez has arranged for an international live broadcast of the event. \nThe program will be held from the start of the eclipse at 6:30am PST up until its end at 9:30am PST. In addition to the Chilean view of the sun\, there will be short presentations by students and teacher from all around the world. \nTo attend\, have zoom installed and then visit the page below at the appropriate time. \nhttps://www.astrozoom.space/attend \n \nViews: 2
URL:https://www.ocastronomers.org/calendar/online-solar-eclipse-2020/
LOCATION:Online
CATEGORIES:Celestial Events,Outreach,Star Parties
ATTACH;FMTTYPE=image/jpeg:https://www.ocastronomers.org/wp-content/uploads/2020/12/Eclipse_Chile_PST.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20201214
DTEND;VALUE=DATE:20201215
DTSTAMP:20260409T140933
CREATED:20201123T191710Z
LAST-MODIFIED:20201201T124742Z
UID:10001040-1607904000-1607990399@www.ocastronomers.org
SUMMARY:New Moon
DESCRIPTION:Views: 2
URL:https://www.ocastronomers.org/calendar/new-moon-19/
CATEGORIES:Moon Phases
ATTACH;FMTTYPE=image/jpeg:https://www.ocastronomers.org/wp-content/uploads/2020/11/moon_new.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20201213
DTEND;VALUE=DATE:20201214
DTSTAMP:20260409T140933
CREATED:20201123T231405Z
LAST-MODIFIED:20201201T124612Z
UID:10001044-1607817600-1607903999@www.ocastronomers.org
SUMMARY:Geminid Meteor Shower
DESCRIPTION:Views: 2
URL:https://www.ocastronomers.org/calendar/geminid-meteor-shower-2020/
CATEGORIES:Meteor Showers
ATTACH;FMTTYPE=image/jpeg:https://www.ocastronomers.org/wp-content/uploads/2020/11/Meteor-Showers.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201212T220000
DTEND;TZID=America/Los_Angeles:20201212T233000
DTSTAMP:20260409T140933
CREATED:20201010T212352Z
LAST-MODIFIED:20201010T212419Z
UID:10001032-1607810400-1607815800@www.ocastronomers.org
SUMMARY:Open Spiral Bar
DESCRIPTION:This event is free and open to public\, to attend please register using the zoom.us link on the box above. \nCome and socialize with your fellow astronomy enthusiasts face-to-face virtually!\nBring your latest astrophotos\, mini-presentation\, questions or none and your own refreshments. \n \nViews: 2
URL:https://www.ocastronomers.org/calendar/open-spiral-bar-december-2020/
LOCATION:Online
CATEGORIES:Meeting After the Meeting
ATTACH;FMTTYPE=image/jpeg:https://www.ocastronomers.org/wp-content/uploads/2020/06/Meeting6.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201211T193000
DTEND;TZID=America/Los_Angeles:20201211T213000
DTSTAMP:20260409T140933
CREATED:20201026T193327Z
LAST-MODIFIED:20201212T100213Z
UID:10001035-1607715000-1607722200@www.ocastronomers.org
SUMMARY:Online General Meeting - December 2020
DESCRIPTION:This is an online event\, to attend please register with zoom using the link on the box above. \nState of the Universe Report\n \nThis lecture will discuss the current understanding and the latest discoveries regarding cosmology—the science of the universe as a whole—and galaxies and planets. There is overwhelming evidence that most of the density of the universe is invisible dark matter and dark energy\, with atomic matter making up only about five percent of cosmic density. UC Santa Cruz cosmologists helped to create the standard modern cosmological theory—but the latest high-precision measurements have revealed potential discrepancies that may require new physics. Galaxies were long thought to start as disks of gas and stars\, but observations by Hubble Space Telescope show that most galaxies instead start pickle-shaped. More massive galaxies have massive black holes at their centers\, and matter falling onto these black holes causes outflows of energy that can strongly affect their host galaxies. Information about planetary systems is growing rapidly with new observations\, and our own solar system seems increasingly to be unusual. \nJoel R. Primack\n \nJoel R. Primack specializes in the formation and evolution of galaxies and the nature of the dark matter that makes up most of the matter in the universe. After helping to create what is now called the “Standard Model” of particle physics\, Primack began working in cosmology in the late 1970s\, and he became a leader in the new field of particle astrophysics. His 1982 paper with Heinz Pagels was the first to propose that a natural candidate for the dark matter is the lightest supersymmetric particle. He is one of the principal originators and developers of the theory of Cold Dark Matter\, which has become the basis for the standard modern picture of structure formation in the universe. With support from the National Science Foundation\, NASA\, and the Department of Energy\, he has been using supercomputers to simulate and visualize the evolution of the universe and the formation of galaxies under various assumptions. \nHere’s the link to a recording of my 10 November 2020 UCSC Emeriti Research Lecture “State of the Universe Report: Cosmos\, Galaxies\, Planets” on YouTube:\nhttps://www.youtube.com/watch?v=BAuiSC0iUXE\n\nHere are some of my recent research results that may be of wider interest:\n\n— Local measurements of the the Hubble parameter give H_0 = 73 ± 1 km/s/Mpc\, while measurements of the Cosmic Microwave Background extrapolated to the present with the standard ΛCDM cosmology give H_0 = 67 ± 0.5 km/s/Mpc.  This “Hubble tension” could be resolved if there was a brief period when dark energy contributed about 10% to the cosmic density about 35\,000 years after the Big Bang.  I initiated the first N-body simulations with this Early Dark Energy (EDE) cosmology.  Our paper on this https://arxiv.org/pdf/2006.14910.pdf was led by Anatoly Klypin.  We found that EDE predicts 50% more rich clusters of galaxies at redshift z=1 than standard ΛCDM\, and many more galaxies at higher redshifts.  These predictions will be tested by new astronomical surveys now underway. We are resubmitting the paper to MNRAS in response to a favorable referee report\, so it will be published soon.  We are setting up to run 500 Mpc/h paired simulations with Bolshoi resolution of standard ΛCDM and EDE; the use of the same random number seed will ensure that all the large-scale structures will correspond in these simulations.  We plan to do abundance matching with both simulations\, to fill all the halos with UniverseMachine and Santa Cruz SAM galaxies\, and to compare with observations.\n\n— I initiated a paper that shows that Earth may be a “Goldilocks” planet in a new way\, with enough radioactive heat generation to power plate tectonics and not too much to kill the geodynamo generating the Earth’s magnetic field.  Tectonics and a magnetic field may both be necessary for the evolution of complex life.  Earth’s radioactive heat is generated by the two longest-lived radioactive elements thorium and uranium\, which are produced in extremely rare events such as neutron-star mergers — as a result\, the amount of Th and U varies a lot between different planetary systems.  Our paper\, led by my UCSC colleague Francis Nimmo\, was published November 10\n https://ui.adsabs.harvard.edu/abs/2020ApJ…903L..37N\nThe UCSC press release is at https://news.ucsc.edu/2020/11/planet-dynamos.html \,\nwith some popular articles at\nhttps://astrobiology.nasa.gov/news/how-radioactivite-elements-may-make-planets-suitable-or-hostile-to-life/\nhttps://www.scientificamerican.com/article/stellar-smashups-may-fuel-planetary-habitability-study-suggests/\nhttps://cosmoquest.org/x/2020/11/radioactive-elements-may-be-crucial-to-rocky-planets-habitability/\nhttps://www.centauri-dreams.org/2020/11/13/radioactive-elements-and-planetary-habitability/\nhttps://astrobites.org/2020/11/17/radiogenic-heat-hurts-dynamos/\nhttps://www.universetoday.com/148796/what-role-do-radioactive-elements-play-in-a-planets-habitability/\n\n— I’ve continued to make novel uses of machine learning to compare simulations with observations and to analyze observations.  My group’s latest papers on this focused on giant clumps found in HST images of most redshift z > 1 star-forming galaxies.  In https://ui.adsabs.harvard.edu/abs/2020MNRAS.499..814H we trained a CNN to measure the masses of giant clumps; we made public our analysis of the entire CANDELS galaxy dataset\, and we used a complete set from GOODS-N and S with 7 wavebands to measure clump properties as functions of galaxy properties including sSFR\, radius\, and stellar mass.  In https://ui.adsabs.harvard.edu/abs/2020arXiv201106616G we trained a CNN to measure the lifetimes of the clumps in the CANDELS data; this paper was just accepted for publication.  Our earlier paper that made extensive use of machine learning to compare HST observations with theory was profiled in https://news.ucsc.edu/2018/04/deep-learning-galaxies.html \n\n\nViews: 2
URL:https://www.ocastronomers.org/calendar/general-meeting-december-2020/
LOCATION:Online
CATEGORIES:General Meetings
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20201207
DTEND;VALUE=DATE:20201208
DTSTAMP:20260409T140933
CREATED:20201123T191600Z
LAST-MODIFIED:20201123T220849Z
UID:10001039-1607299200-1607385599@www.ocastronomers.org
SUMMARY:Last Quarter Moon
DESCRIPTION:Views: 2
URL:https://www.ocastronomers.org/calendar/last-quarter-moon/
CATEGORIES:Moon Phases
ATTACH;FMTTYPE=image/jpeg:https://www.ocastronomers.org/wp-content/uploads/2020/11/moon_3rd-quarter.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201206T080000
DTEND;TZID=America/Los_Angeles:20201206T170000
DTSTAMP:20260409T140933
CREATED:20201206T195650Z
LAST-MODIFIED:20201206T195650Z
UID:10001059-1607241600-1607274000@www.ocastronomers.org
SUMMARY:Ursid Meteors
DESCRIPTION:Catch the shooting stars of the last major meteor shower of the year\, the Ursids\, when it peaks between the night of December 21 and 22\, 2020. \nViews: 2
URL:https://www.ocastronomers.org/calendar/ursid-meteors/
CATEGORIES:Meteor Showers
ATTACH;FMTTYPE=image/jpeg:https://www.ocastronomers.org/wp-content/uploads/2020/11/Meteor-Showers.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201204T193000
DTEND;TZID=America/Los_Angeles:20201204T213000
DTSTAMP:20260409T140933
CREATED:20201016T192330Z
LAST-MODIFIED:20201127T224928Z
UID:10001033-1607110200-1607117400@www.ocastronomers.org
SUMMARY:Online Beginner's Class
DESCRIPTION:This event is free and open to public; to attend please register using the zoom.us link on the box above. \nThe 6th session of the Beginners Astronomy Class covers the basics of astrophotography\, covering different types of imaging\, how different types of cameras are used for this kind of photography\, and other equipment and considerations for taking a good picture.\nThis session is taught by Kyle Coker\, who is active in the club’s AstroImaging special interest group. \nFree and open to the public as well as members of OCA. \nViews: 2
URL:https://www.ocastronomers.org/calendar/beginners-class-december-2020/
LOCATION:Online
CATEGORIES:Beginner's Class
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20201130
DTEND;VALUE=DATE:20201201
DTSTAMP:20260409T140933
CREATED:20201123T220807Z
LAST-MODIFIED:20201123T221040Z
UID:10001043-1606694400-1606780799@www.ocastronomers.org
SUMMARY:Full Moon
DESCRIPTION:Views: 2
URL:https://www.ocastronomers.org/calendar/full-moon-19/
CATEGORIES:Moon Phases
ATTACH;FMTTYPE=image/jpeg:https://www.ocastronomers.org/wp-content/uploads/2020/11/moon_full.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201129T233000
DTEND;TZID=America/Los_Angeles:20201130T035000
DTSTAMP:20260409T140933
CREATED:20201123T232735Z
LAST-MODIFIED:20201123T232735Z
UID:10001045-1606692600-1606708200@www.ocastronomers.org
SUMMARY:Penumbral Lunar Eclipse
DESCRIPTION:Views: 2
URL:https://www.ocastronomers.org/calendar/penumbral-lunar-eclipse/
CATEGORIES:Celestial Events
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201120T203000
DTEND;TZID=America/Los_Angeles:20201120T220000
DTSTAMP:20260409T140933
CREATED:20201010T212118Z
LAST-MODIFIED:20201117T090716Z
UID:10001030-1605904200-1605909600@www.ocastronomers.org
SUMMARY:Ventura County Astronomical Society's Online General Meeting
DESCRIPTION:This is an online event held by OCA for VCAS.\nNo prior registration is required but when entering the webinar\, zoom will ask for your name and email.\nAt the time of the meeting\, to attend via zoom app click here\, via your browser click here.\nTo install the zoom app click here.\n \n \nMolly Shelton is a Power Systems Engineer at Jet Propulsion Laboratory in Pasadena.  She is an early career hire\, graduating from college with a BS in Physics in 2016 and joining the Power and Sensor Systems group to design\, build and test hardware for missions all throughout the solar system.  She has worked on a handful of projects in her 4 years at JPL including Dawn\, SHERLOC\, and Europa Clipper.  She started her path to JPL in a high school robotics club and is honored to be able to share her story thus far with those who yearn for the stars in the same way. \n \nViews: 2
URL:https://www.ocastronomers.org/calendar/vcas-general-meeting-november-2020/
LOCATION:Online
CATEGORIES:General Meetings,Non OCA Event
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201117T180000
DTEND;TZID=America/Los_Angeles:20201117T190000
DTSTAMP:20260409T140933
CREATED:20201112T233945Z
LAST-MODIFIED:20201112T234926Z
UID:10001037-1605636000-1605639600@www.ocastronomers.org
SUMMARY:Virtual Outreach Event Beatty Middle School in Buena Park @6pm
DESCRIPTION:Buana Park School District is combining all middle schools to have an astronomy night on Nov. 17th\, 2020. \nViews: 2
URL:https://www.ocastronomers.org/calendar/virtual-outreach-event/
LOCATION:Gordon H. Beatty Middle School
CATEGORIES:Outreach,Private
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201115T103000
DTEND;TZID=America/Los_Angeles:20201115T130000
DTSTAMP:20260409T140933
CREATED:20201108T003834Z
LAST-MODIFIED:20201108T003834Z
UID:10001036-1605436200-1605445200@www.ocastronomers.org
SUMMARY:OCA Board Meeting
DESCRIPTION:The OCA board meeting is open to all current members of the club. The meeting will be held via zoom starting at 10:30am\, Nov. 15\,2020. To attend contact Alan Smallbone for meeting link and please include any items to be put on the agenda. \nViews: 2
URL:https://www.ocastronomers.org/calendar/oca-board-meeting-8/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201114T220000
DTEND;TZID=America/Los_Angeles:20201114T233000
DTSTAMP:20260409T140933
CREATED:20201005T161532Z
LAST-MODIFIED:20201005T161532Z
UID:10001029-1605391200-1605396600@www.ocastronomers.org
SUMMARY:Open Spiral Bar
DESCRIPTION:This event is free and open to public\, to attend please register using the zoom.us link on the box above. \nCome and socialize with your fellow astronomy enthusiasts face-to-face virtually!\nBring your latest astrophotos\, mini-presentation\, questions or none and your own refreshments. \n \nViews: 2
URL:https://www.ocastronomers.org/calendar/open-spiral-bar-november-2020/
LOCATION:Online
CATEGORIES:Meeting After the Meeting
ATTACH;FMTTYPE=image/jpeg:https://www.ocastronomers.org/wp-content/uploads/2020/06/Meeting6.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201113T193000
DTEND;TZID=America/Los_Angeles:20201113T213000
DTSTAMP:20260409T140933
CREATED:20201001T154141Z
LAST-MODIFIED:20201003T192905Z
UID:10001027-1605295800-1605303000@www.ocastronomers.org
SUMMARY:Online General Meeting - November 2020
DESCRIPTION:This is an online event\, to attend please register with zoom using the link on the box above. \nNASA’s New Horizons Mission to Pluto and Beyond\n \nSince its launch in 2006\, the New Horizons spacecraft has been speeding out of the solar system\, transforming our understanding of planetary science along the way. In 2015\, it provided the first close-up views of the Pluto system and revealed an astonishingly active world\, replete with active glaciers\, dynamic atmosphere\, and possible signs of cryovolcanism. Four years (and about five astronomical units) later\, New Horizons went on to perform the first flyby of a small Kuiper Belt Object: (486958) Arrokoth (formerly 2014 MU69). This 30-km wide\, icy world is a relic of planet formation\, with its own odd geology and formation story. In this talk\, I’ll recap New Horizons amazing journey—and my parallel journey here on Earth\, going from a graduate student\, competing against the New Horizons team\, to a researcher embedded within the team and shaping its future. I’ll close with some perspective about future exploration of the outer solar system. \nJames Tuttle Keane\n \nDr. James Tuttle Keane hails from Cedar Rapids\, Iowa. He received a bachelor’s degrees in Astronomy and Geology from the University of Maryland\, College Park\, and a doctorate in planetary science from the University of Arizona. After a postdoctoral position at the California Institute of Technology\, he started at JPL in 2020. Dr. Keane is a planetary scientist\, studying the interactions between orbital dynamics\, rotational dynamics\, and geologic processes on rocky and icy worlds across the solar system. He uses a combination of theoretical methods\, coupled with the analysis of spacecraft-derived datasets to investigate the dynamics\, structure\, origin\, and evolution of solar system bodies. He has extensive experience with NASA missions\, including GRAIL\, New Horizons\, and the proposed Io Volcano Observer. \nViews: 2
URL:https://www.ocastronomers.org/calendar/general-meeting-november-2020/
LOCATION:Online
CATEGORIES:General Meetings
ATTACH;FMTTYPE=image/png:https://www.ocastronomers.org/wp-content/uploads/2020/10/Arrokoth.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201106T193000
DTEND;TZID=America/Los_Angeles:20201106T213000
DTSTAMP:20260409T140933
CREATED:20200808T194038Z
LAST-MODIFIED:20201003T203132Z
UID:10001020-1604691000-1604698200@www.ocastronomers.org
SUMMARY:Online Beginner's Class
DESCRIPTION:This is a free and open to public online event\, to attend please register with zoom using the link on the box above. \nThe 3rd session of the Beginners Astronomy Class covers different methods of finding objects in the night sky.  Special topic is learning the constellations. \nViews: 2
URL:https://www.ocastronomers.org/calendar/beginners-class-november-2020/
LOCATION:Online
CATEGORIES:Beginner's Class
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201016T203000
DTEND;TZID=America/Los_Angeles:20201016T223000
DTSTAMP:20260409T140933
CREATED:20201005T145108Z
LAST-MODIFIED:20201012T195947Z
UID:10001028-1602880200-1602887400@www.ocastronomers.org
SUMMARY:Ventura County Astronomical Society's Online General Meeting
DESCRIPTION:This is an online event held by OCA for VCAS.\nNo prior registration is required but when entering the webinar\, zoom will ask for your name and email.\nAt the time of the meeting\, to attend via zoom app click here\, via your browser click here.\nTo install the zoom app click here.\n \n  \n2020: A Year of Perseverance and Ingenuity\nSarah Elizabeth McCandless\n \nSarah Elizabeth McCandless works for the Jet Propulsion Laboratory (JPL) as a navigation engineer. She performs operational as well as pre-launch orbit determination analyses and has worked on a variety of flight projects including MAVEN (Mars Atmosphere and Volatile Evolution)\, InSight\, Mars 2020\, and Europa Clipper. She also develops multi-mission software tools and has researched the feasibility of using optical communication observables for deep-space navigation. She earned a B.S. in aerospace engineering and a minor in French at the University of Kansas. Subsequently\, she earned an M.S. in aerospace engineering from the University of Texas. Outside of work\, Sarah Elizabeth enjoys flying Cessna 172s\, hiking\, and reading. \nViews: 2
URL:https://www.ocastronomers.org/calendar/vcas-general-meeting-october-2020/
LOCATION:Online
CATEGORIES:General Meetings,Non OCA Event
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201010T220000
DTEND;TZID=America/Los_Angeles:20201010T233000
DTSTAMP:20260409T140933
CREATED:20200822T155011Z
LAST-MODIFIED:20200822T155105Z
UID:10001023-1602367200-1602372600@www.ocastronomers.org
SUMMARY:Open Spiral Bar
DESCRIPTION:This event is free and open to public\, to attend please register using the zoom.us link on the box above. \nCome and socialize with your fellow astronomy enthusiasts face-to-face virtually!\nBring your latest astrophotos\, mini-presentation\, questions or none and your own refreshments. \n \nViews: 2
URL:https://www.ocastronomers.org/calendar/open-spiral-bar-october-2020/
LOCATION:Online
CATEGORIES:Meeting After the Meeting
ATTACH;FMTTYPE=image/jpeg:https://www.ocastronomers.org/wp-content/uploads/2020/06/Meeting6.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201009T193000
DTEND;TZID=America/Los_Angeles:20201009T213000
DTSTAMP:20260409T140933
CREATED:20200822T152000Z
LAST-MODIFIED:20201014T185123Z
UID:10001022-1602271800-1602279000@www.ocastronomers.org
SUMMARY:Online General Meeting - October 2020
DESCRIPTION:This is an online event\, to attend please register with zoom using the link on the box above. \nDownload: Club Announcements \nThis meeting’s speaker changed at the last minutes and the information reflected here has not been updated. \nDark Matter and the Dance of Dwarf Galaxies\n \nMajor galaxies\, such as our cosmic home the Milky Way\, the nearby Andromeda galaxy\, or Centaurus A\, are surrounded by swarms of smaller dwarf satellite galaxies. Over the past 15 years\, our knowledge of these satellite galaxies has exploded. The number of known Milky Way satellites has quadrupled\, and highly precise measurements of their motions have provided unprecedented insights into their complex orbital dance. In my research\, I investigate the distribution and motion of satellite galaxies to test our ideas of how the cosmos in general\, and galaxies in particular\, have formed and evolved. Our current leading model of cosmology was largely developed on cosmic scales\, and implies that most of the mass in the Universe is dominated by unknown stuff: Dark Matter. Based on this cosmological model\, computer simulations can nowadays follow the emergence and evolution of structure in model universes. These simulations predict the distribution and properties of galaxies down to the smallest scales (astronomically speaking). They predict a highly chaotic tangle of satellite galaxies. In contrast\, my research finds that the observed situation resembles an ordered choreography: the satellite galaxies around the Milky Way\, Andromeda\, and Centaurus A are aligned along planes. Many satellites also move along these structures in a common direction. This finding poses a serious challenge to our model of cosmology – and might point at a fundamental misinterpretation of cosmic proportions. \nMarcel S. Pawlowski\n \nMy research is situated at the intersection of observations and cosmological simulations. I am most interested in testing our cosmological knowledge and our understanding of the properties and dynamics of dwarf galaxies with observations of nearby systems of satellite galaxies. After receiving my PhD from the University of Bonn in 2013\, I moved to the United States for a postdoc position at Case Western Reserve University in Cleveland\, Ohio. In 2016\, I was awarded a NASA Hubble Fellowship to work at the University of California Irvine. At the end of 2018 I moved back to Germany to my current position as Schwarzschild Fellow at the Leibniz-Institute for Astrophysics in Potsdam. \nViews: 2
URL:https://www.ocastronomers.org/calendar/online-general-meeting-october-2020/
LOCATION:Online
CATEGORIES:General Meetings
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201002T200000
DTEND;TZID=America/Los_Angeles:20201002T213000
DTSTAMP:20260409T140933
CREATED:20200311T161219Z
LAST-MODIFIED:20200526T223621Z
UID:10001003-1601668800-1601674200@www.ocastronomers.org
SUMMARY:Private Outreach - Canceled
DESCRIPTION:Views: 2
URL:https://www.ocastronomers.org/calendar/private-outreach-la-paz-middle-school-2/
LOCATION:La Paz Middle School\, 25151 Pradera Dr\, Mission Viejo\, CA\, 92691\, United States
CATEGORIES:Outreach,Private
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20201002T193000
DTEND;TZID=America/Los_Angeles:20201002T213000
DTSTAMP:20260409T140933
CREATED:20200808T193812Z
LAST-MODIFIED:20200905T173755Z
UID:10001019-1601667000-1601674200@www.ocastronomers.org
SUMMARY:Online Beginner's Class
DESCRIPTION:This event is free and open to public; to attend please register using the zoom.us link on the box above. \nThe 2nd session of the Beginners Astronomy Class covers the different types of equipment used to observe the night sky\, including telescopes\, mounts\, eyepieces\, filters\, and advantages and disadvantages of different options.\nThis session is a must if thinking about buying a telescope. \nFor details\, please visit here and download the sample information PDF package. \nViews: 2
URL:https://www.ocastronomers.org/calendar/beginners-class-october-2020/
LOCATION:Online
CATEGORIES:Beginner's Class
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200930T190000
DTEND;TZID=America/Los_Angeles:20200930T203000
DTSTAMP:20260409T140933
CREATED:20200930T001810Z
LAST-MODIFIED:20200930T001835Z
UID:10001026-1601492400-1601497800@www.ocastronomers.org
SUMMARY:Virtual Outreach
DESCRIPTION:Event:           Washington Elementary\nDate:             Wednesday\, 9/30/2020\nTime:             Viewing at 7:00 PM\, Sunset at 7:45 PM \nPlace:           Washington Elementary\nAddress:       4225 Sanborn Ave; Lynwood\, 90262\nLocation:       33°55’29″N\, 118°11’23″W \nViews: 2
URL:https://www.ocastronomers.org/calendar/outreach-test/
LOCATION:Online
CATEGORIES:Outreach,Private
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200925T203000
DTEND;TZID=America/Los_Angeles:20200925T223000
DTSTAMP:20260409T140933
CREATED:20200918T181112Z
LAST-MODIFIED:20200920T122004Z
UID:10001025-1601065800-1601073000@www.ocastronomers.org
SUMMARY:Ventura County Astronomical Society's Online General Meeting
DESCRIPTION:This is an online event held by OCA for VCAS.\nNo prior registration is required but when entering the webinar\, zoom will ask for your name and email.\nAt the time of the meeting\, to attend via zoom app click here\, via your browser click here.\nTo install the zoom app click here.\n \nIt Broke! A Story of How We Fixed It\n \nNASA’s Deep Space 1 (DS1) mission was designed to take risks so subsequent missions would not have to. Following its successful 1998-1999 prime mission to test new technologies\, DS1 embarked on an ambitious two-year extended mission dedicated to comet exploration. However\, that journey was soon interrupted as the probe suffered a hardware failure widely considered to be catastrophic. \nUnder Marc Rayman’s leadership\, the JPL operations team then undertook one of the most remarkable deep-space rescue missions ever attempted. After seven months of intensive and stressful work\, they managed to restore the spacecraft to an operational capability from well over 150 million miles away. DS1 then resumed its pursuit of the comet. The team encountered and overcame more daunting challenges in the subsequent 15 months\, and in 2001 they succeeded in acquiring NASA’s first close-up images of a comet nucleus and other unique data. \n \nThis extraordinary and exciting success story is not well known\, even among the astronomy and space communities. Dr. Rayman described it in a highly entertaining and inspiring public presentation last year. He will introduce the video\, we will all watch it\, and then he will answer questions. The video can be found here. \nMarc Rayman\n \nMarc Rayman is not only a top rocket scientist at NASA’s Jet Propulsion Laboratory but also a magnificent communicator. He is currently JPL’s chief engineer for mission operations and science. \nHe grew up in Toledo\, Ohio\, and earned a B.A. in physics from Princeton University. His undergraduate work focused on astrophysics and cosmology. He received an M.S. in physics from the University of Colorado in Boulder\, where he conducted investigations in nuclear physics. He then performed research at the Joint Institute for Laboratory Astrophysics (JILA) on experimental tests of special relativity and atomic and laser physics\, and received his Ph.D. there. He continued at JILA as a postdoctoral researcher. Throughout his time at JILA\, he worked with Dr. John Hall\, who subsequently won a Nobel Prize in Physics. \nDr. Rayman combined his scientific training with his lifelong study and passion for astronomy and the exploration of space by joining JPL in 1986. His work there has spanned a broad range\, including optical interferometry missions to detect planets around other stars\, design of a mission to return samples from Mars\, a laser altimeter for Mars\, the Spitzer infrared space telescope\, the development of systems to use lasers instead of radios to communicate with interplanetary spacecraft\, and more. \n \nIn 1994\, he helped initiate a new NASA program to characterize highly sophisticated and risky technologies for future space science missions by flying them on dedicated test flights. The first mission of this New Millennium program\, Deep Space 1\, was launched in 1998\, and he worked on it from its inception in 1995 to its conclusion in 2001. During the course of the project\, Dr. Rayman served as chief mission engineer\, mission director\, and project manager. The new technologies that were tested on DS1 (including such exotic systems as ion propulsion and artificial intelligence) were designed to reduce the cost and risk and to improve the performance of subsequent interplanetary missions. The primary mission was extremely successful and led to a very productive and exciting extension\, culminating in a spectacular encounter with Comet Borrelly that yielded NASA’s first close-up pictures of the nucleus of a comet. The spacecraft remains in orbit around the Sun. \nHe was chief engineer\, mission director\, and project manager on a mission that built on DS1 to explore the two largest uncharted worlds in the inner solar system. Launched in 2007\, Dawn orbited two giants of the main asteroid belt\, protoplanet Vesta and dwarf planet Ceres\, in an ambitious mission to reveal insights into the dawn of the solar system. After a spectacularly successful investigation of Vesta in 2011-2012\, it arrived at Ceres in 2015\, where it will remain forever. It is the only spacecraft ever to orbit two extraterrestrial destinations. The spacecraft outlasted its expected lifetime\, and the mission concluded successfully in 2018. \n \nDr. Rayman is the recipient of numerous honors. His many accolades from NASA include a remarkable three Exceptional Achievement Medals and four Outstanding Leadership Medals\, which are among NASA’s most selective awards. He was named a JPL Fellow\, the highest technical position there\, “for extraordinary technical contributions made over an extended period.” He is the only person to have received both the Exceptional Technical Excellence Award and the Exceptional Leadership Award\, two of JPL’s most prestigious honors. Asteroid Rayman was named in recognition of his contributions to space exploration. On behalf of the Dawn team\, in 2016 he accepted the Robert J. Collier Trophy\, the greatest award in the US for space or aviation. (The trophy resides at the Smithsonian National Air & Space Museum in Washington.) Among his other honors was receiving the Astronautics Engineer of the Year Award from the National Space Club and Foundation. \n \nMarc is also very active in education and public outreach. He is a highly regarded and very popular speaker\, relating the thrill of science and the excitement of discovery\, and he has appeared frequently on television and been quoted often in other news media on subjects as wide-ranging as DS1 and Dawn\, a fire onboard the Mir space station\, the discovery of the top quark\, and the profundity of humankind’s exploration of the cosmos. He collaborates with the creator of the popular syndicated comic strip Brewster Rockit: Space Guy! for special editions on science topics. His DS1 blog had an enormous following and gained critical acclaim as it provided an exceptionally entertaining and informative view into the flight of DS1\, and his Dawn blog continued in the same delightful style. Marc is technical advisor and a popular writer for NASA’s educational website the Space Place (where his digital alter ego\, Dr. Marc\, resides). Marc received a special award from JPL for his creative and engaging work to inform and inspire the public. \nIn addition to more than 75 scholarly publications in physics\, space science\, and space engineering\, he has published many articles on Apollo\, Skylab\, the space shuttle\, piloted and robotic missions of the former USSR\, interplanetary missions\, and a variety of topics in astrophysics\, cosmology\, and space exploration for reference books\, encyclopedias\, magazines\, and newspapers. \n \nOne of Marc’s favorite hobbies is learning about the space activities of all space-faring nations. Since before the age of 10\, he has been building an extensive collection of information (and memorabilia) from over 40 nations. (His extraordinary personal collection is featured in this amusing video tour geared for space buffs.) \nHis other hobbies include international dancing (he and his wife teach and dance with several groups)\, photography\, hiking\, and other outdoor activities. Marc also holds a black belt in karate. His wife\, Dr. Janice Rayman\, is a brain scientist and a very experienced mountaineer. They live in La Cañada\, California\, with their cats\, Quark and Lepton\, tropical fish\, and a large variety of fauna and flora in their pond. \n  \nViews: 2
URL:https://www.ocastronomers.org/calendar/vcas-general-meeting-september-2020/
LOCATION:Online
CATEGORIES:General Meetings,Non OCA Event
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200920T103000
DTEND;TZID=America/Los_Angeles:20200920T123000
DTSTAMP:20260409T140933
CREATED:20200830T174516Z
LAST-MODIFIED:20200830T174516Z
UID:10001024-1600597800-1600605000@www.ocastronomers.org
SUMMARY:OCA Board meeting
DESCRIPTION:The OCA board meeting will be at 10:30am and is open to all members. Contact Alan Smallbone the OCA secretary for more information and the link to join the online zoom meeting. \nViews: 2
URL:https://www.ocastronomers.org/calendar/oca-board-meeting-7/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200912T220000
DTEND;TZID=America/Los_Angeles:20200912T233000
DTSTAMP:20260409T140933
CREATED:20200809T134352Z
LAST-MODIFIED:20200821T210100Z
UID:10001021-1599948000-1599953400@www.ocastronomers.org
SUMMARY:Open Spiral Bar
DESCRIPTION:This event is free and open to public\, to attend please register using the zoom.us link on the box above. \nCome and socialize with your fellow astronomy enthusiasts face-to-face virtually!\nBring your latest astrophotos\, mini-presentation\, questions or none and your own refreshments. \n \nViews: 2
URL:https://www.ocastronomers.org/calendar/open-spiral-bar-september-2020/
LOCATION:Online
ATTACH;FMTTYPE=image/jpeg:https://www.ocastronomers.org/wp-content/uploads/2020/06/Meeting6.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200911T193000
DTEND;TZID=America/Los_Angeles:20200911T213000
DTSTAMP:20260409T140933
CREATED:20200713T100821Z
LAST-MODIFIED:20200816T070447Z
UID:10001016-1599852600-1599859800@www.ocastronomers.org
SUMMARY:Online General Meeting - September 2020
DESCRIPTION:This event is free and open to public\, to attend please use the zoom.us link on the box above. \nUncovering the Death Throes of Massive Stars Through Supernovae\n \nStars more massive than about 10 solar masses explode at the end of their life and die as supernovae. How massive stars look like when they explode? Astronomers try to answer this question through supernovae. It has been recently recognized that massive stars seem to have an unexpectedly active life just before they explode. In this talk\, I will introduce supernovae and what they tell us about the “death throes” of massive stars. \nTakashi Moriya\n \nI am an Assistant Professor at National Astronomical Observatory of Japan (NAOJ). I was born and grew up in Tokyo\, Japan. I received my PhD in Astronomy from the University of Tokyo in 2013. I worked at University of Bonn in Germany as a postdoctoral research fellow from 2013 to 2016 and moved to NAOJ in 2016. My research interest is mainly in theoretical aspects of supernovae and stellar evolution\, but I also work on observational astronomy using the Subaru telescope operated by NAOJ. \nViews: 2
URL:https://www.ocastronomers.org/calendar/online-general-meeting-september-2020/
LOCATION:Online
CATEGORIES:General Meetings
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200904T193000
DTEND;TZID=America/Los_Angeles:20200904T213000
DTSTAMP:20260409T140933
CREATED:20200808T192227Z
LAST-MODIFIED:20200822T165428Z
UID:10001018-1599247800-1599255000@www.ocastronomers.org
SUMMARY:Online Beginner's Class
DESCRIPTION:This event is free and open to public\, to attend please use the zoom.us link on the box above. \nThe first session of the Beginners Astronomy Class gives a general overview of all of the different objects you can see in the night and day time skies\, with some history and information about what they are and their significance.  An overview of the current scientific understanding of the Universe’s beginning\, present and future is also covered. \nFor details\, please visit here and download the sample information PDF package. \nViews: 2
URL:https://www.ocastronomers.org/calendar/beginners-class-september-2020/
LOCATION:Online
CATEGORIES:Beginner's Class
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200815T220000
DTEND;TZID=America/Los_Angeles:20200815T233000
DTSTAMP:20260409T140933
CREATED:20200713T122525Z
LAST-MODIFIED:20200724T223340Z
UID:10001017-1597528800-1597534200@www.ocastronomers.org
SUMMARY:Open Spiral Bar
DESCRIPTION:This event is free and open to public\, to attend please use the zoom registration link on the box above. \nCome and socialize with your fellow astronomy enthusiasts face-to-face virtually!\nBring your latest astrophotos\, mini-presentation\, questions or none and your own refreshments. \n \nViews: 2
URL:https://www.ocastronomers.org/calendar/open-spiral-bar-august-2020/
LOCATION:Online
ATTACH;FMTTYPE=image/jpeg:https://www.ocastronomers.org/wp-content/uploads/2020/06/Meeting6.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20200814T193000
DTEND;TZID=America/Los_Angeles:20200814T213000
DTSTAMP:20260409T140933
CREATED:20200603T205519Z
LAST-MODIFIED:20200724T223321Z
UID:10001012-1597433400-1597440600@www.ocastronomers.org
SUMMARY:Online General Meeting - August 2020
DESCRIPTION:This event is free and open to public\, to attend please use the zoom registration link on the box above. \nSolar Eclipses: Math\, Science\, and Spectacle\nA composite image of the 2013 total solar eclipse at solar maximum. (Photos by Jay Pasachoff\, Allen Davis\, and Vojtech Rusin; computer compositing by Miloslav Druckmüller) \nAs a veteran of 72 solar eclipses —including 35 total solar eclipses\, 18 annular solar eclipses\, and 19 partial solar eclipses— astronomer Jay Pasachoff is uniquely positioned to share recent scientific work related to eclipses\, international coordination of observations\, and future plans. What role does mathematics play in predicting eclipses\, from the ancient saros observations to Halley’s 1715 map\, and up to today’s web-based zoom-and-click maps? How do theoretical predictions based on magnetic-field measurements\, emission spectra of high ionization lines\, and radio observations compare to the high res images available today? \nThe sky with the total eclipse corona and the umbra during the July 2\, 2019\, total solar eclipse photographed from the Cerro Tololo Inter-American Observatory\, Chile (David Sliski\, as part of the Williams College Expedition). \nThe beautiful streamers that become dramatically visible during an eclipse’s totality are shaped by the solar corona’s magnetic field. How do theoretical predictions based on magnetic-field measurements\, emission spectra of high ionization lines\, and radio observations compare to the high res images available today? \n \nI will discuss my expeditions to recent solar eclipses\, including total eclipses in the United States in 2017 and in Chile in 2019\, as well as the annular solar eclipse in India in 2019. I will also discuss the next solar eclipses\, including Chile and Argentina on December 14\, 2020\, and Mexico/United States/Canada on April 28\, 2024\, and the October 14\, 2023\, annular eclipse for which the partial-eclipse coverage of the Sun’s diameter from Orange County will be 78%. I will emphasize current topics of research of current solar eclipses\, and how they link with the Sun-Earth connection and our understanding of the coronas of trillions of other stars. \n  \nJay Pasachoff\n \nJay Pasachoff is Field Memorial Professor of Astronomy and Director of the Hopkins Observatory at Williams College\, Williamstown\, Massachusetts\, and a Visiting Scientist at Carnegie Observatories. (Prior to his Williams College appointment\, he was a postdoctoral fellow at Caltech and what was then called the Hale Observatories—Mt. Wilson and Palomar.) A veteran of 72 solar eclipses\, he is Chair of the International Astronomical Union’s Working Group on Solar Eclipses and a member of the American Astronomical Society’s Solar Eclipse Task Force. \n \nHis recent research includes studies of the dynamics of the solar corona studied from the ground at eclipses and from spacecraft\, and the temperature and structure of the corona over the solar-activity cycle from images and spectra. He also studies the atmosphere of Pluto through observation of stellar occultations and participated in the occultation study of Arrokoth that led to the diversion of NASA’s New Horizons spacecraft to image it on January 1\, 2019\, with the farthest-from-Earth photograph ever taken. His current eclipse research is supported by the Solar Terrestrial Program of the Atmospheric and Geospace Sciences Division of the U.S. National Science Foundation. His Pluto/Arrokoth research has been supported by NASA. \n \nPasachoff received the 2003 Education Prize of the American Astronomical Society\, the 2012 Janssen Prize of the Société Astronomique de France\, the 2015 Richtmyer Lecture Award from the American Association of Physics Teachers\, and the 2019 Klumpke-Roberts Award from the Astronomical Society of the Pacific. \nViews: 2
URL:https://www.ocastronomers.org/calendar/general-meeting-august-2020/
LOCATION:Online
CATEGORIES:General Meetings
ATTACH;FMTTYPE=image/jpeg:https://www.ocastronomers.org/wp-content/uploads/2020/06/LASCO_Eclipse_SUVI_195_Label.jpeg
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END:VCALENDAR