BayAstro – Events of Week of 04/05/2021 and Beyond

The BayAstro group publishes announcements of interesting events related to astronomy and aerospace in the San Francisco Bay Area. This can include events such as astronomy and interesting physical science lectures, club meetings, star parties, air shows and other events of interest mostly to amateur astronomers and science enthusiasts. Many thanks to Ken Lum, who created this event listing.
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Due to concerns about the spread of the Coronavirus or COVID-19 virus, some events have been or may be cancelled. Many venues will be closed perhaps until the end of the year. Other events may offer online links and connections. To check on the status of a given event, check their website for updates.
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Monday, 04/05/21
03:30 PM – 04:30 PM

SLAC Colloquium

Polarized emission around the M87 supermassive black hole – Livestream

In 2017 April, the Event Horizon Telescope (EHT) observed the near-horizon region around the supermassive black hole at the core of the M87 galaxy. These 1.3 mm wavelength observations revealed a compact asymmetric ring-like source morphology. This structure originates from synchrotron emission produced by relativistic plasma located in the immediate vicinity of the black hole. Now we present the corresponding linear-polarimetric EHT images of the center of M87. We find that only a part of the ring is significantly polarized. The resolved fractional linear polarization has a maximum located in the southwest part of the ring, where it rises to the level of ∼15%. The polarization position angles are arranged in a nearly azimuthal pattern. We will discuss the polarimetric data reduction and analysis methodology. The polarimetric images carry information about the structure of the magnetic fields responsible for the synchrotron emission. We will discuss the theoretical implications of these observations.

Speaker: Maciek Wielgus, Harvard

See weblink for Zoom link

Website: https://sites.slac.stanford.edu/colloquium/events/polarized-emission-around-the-m87-supermassive-black-hole

Zoom: https://stanford.zoom.us/j/93786509241?pwd=M2NyVzhsb1N2UUpBWUVtbXZHQkZDZz09

Cost: Free

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Tuesday, 04/06/21
06:00 PM – 07:00 PM

Commonwealth Club – Online Event

The Disordered Cosmos – Livestream

What does freedom look like to you? To theoretical physicist Chanda Prescod-Weinstein, freedom is (in part) thinking about “problems like dark matter and dark energy without worrying about cops killing Black people,” and freedom is “everyone having a chance to look at the dark night sky, wonder about it, and know it.” In her new book, The Disordered Cosmos, Dr. Prescod-Weinstein shares a deep love of physics �” including the physics of melanin in skin, the nature of cosmic dark matter, and what may lie beyond the nearly-all-encompassing Standard Model of Particle Physics. Publisher’s Weekly calls The Disordered Cosmos “a resonant paean to the beauties of the cosmos and a persuasive appeal for solutions to injustices in science.”

Speaker: Chanda Prescod-Weinstein, University of New Hampshire

Register at weblink to receive connection information.

Admission is free with special discount code WONDERFEST21

Website: https://wonderfest.org/disordered-cosmos/

Cost: Free ($5 without discount code)

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Thursday, 04/08/21 7:00 PM

California Academy of Sciences

NightSchool: Missions to Mars – Livestream

Mars is hot right now, despite its sub-freezing temperatures. With multiple countries sending spacecraft to the Red Planet this year, we’ll take a look at missions past and future, their breakthroughs and challenges, and what we hope to find when we get there.

Website: https://www.calacademy.org/nightlife/nightschool-missions-to-mars

Zoom: https://www.youtube.com/watch?v=JlJF83_Hne0&list=PLS14biAqBAtGNwvFxHGET8a4SVH03ruR1&index=3

Cost: Free

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Saturday, 04/10/21
09:00 PM – 10:30 PM

Chabot Space and Science Center

Virtual Telescope Viewing – Livestream

Join our resident astronomers on Facebook Live every Saturday evening live from Chabot’s Observation deck!

Each week, our astronomers will guide us through spectacular night sky viewing through Nellie, Chabot‘s most powerful telescope. Weather permitting we will be able to view objects live through the telescopes and our astronomers will be available for an open forum for all of your most pressing astronomy questions.

Other Dates For This Event:
• Saturday, 04/10/21
• Saturday, 04/17/21
• Saturday, 04/24/21
• Saturday, 05/01/21

Website: https://chabotspace.org/calendar/free-telescope-viewings/2021-01-02/

YouTube: https://www.youtube.com/channel/UCarFXs-04xmdHW_PVc7LWRg

Cost: Free

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Monday, 04/12/21
11:00 AM – 12:00 PM

Royal Observatory, Edinburgh

The Discovery of Gravitational Waves – Livestream
A brief (pre)history of the Discovery of Gravitational Waves

Mario Kalomenopoulos

The detection of gravitational waves some years ago, opened a new window to the Universe, created a media fuss and gave a Nobel Prize for Physics! But what is the story behind this discovery? What about the discovery claims of the 60s? And where does Glasgow fit into this mystery? In this talk, we’ll try to answer these questions (and maybe some more) concerning the discovery of these mysterious waves.

Register at weblink to receive connection information

Website: https://www.eventbrite.co.uk/e/online-astronomy-talk-the-discovery-of-gravitational-waves-tickets-139834319213

Cost: Free

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Monday, 04/12/21
03:30 PM – 04:30 PM

SLAC Colloquium

Physics at LHCb – Livestream

I will describe the LHCb experiment that studies decays of b quarks (mass of 5 GeV), and charm quarks (1.5 GeV), and show how studying these particles we are sensitive to physics and new particles at very large mass scales of several TeV and up. Specific measurements of CP violation and tests of lepton flavor universality will be discussed. Strong interactions are also studied; the have detected several particles that do not fit in the simple quark model, such as tetraquarks and pentaquarks.

Speaker: Sheldon Stone, Syracuse Univ.

See weblink for Zoom link.

Website: https://sites.slac.stanford.edu/colloquium/events/physics-lhcb

Zoom: https://stanford.zoom.us/j/92897631537?pwd=bXVQQXQ1UnQzT2hsYXc1QmNnQnZQdz09

Cost: Free

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Monday, 04/12/21 4:30 PM

Stanford University

What happened to the kilogram? – Livestream

For 130 years, a cylinder made of a platinum-iridium alloy stored near Paris was the official definition of a kilogram, the basic unit of mass. This all changed on May 20, 2019: a kilogram is now defined by a fundamental constant of nature known as the Planck constant h, which relates the energy of a photon to its frequency: h= 6.62607015 10-34 kilograms times square meters per second.

Sounds complicated? In this talk, I will provide the reasons for changing the definition of the kilogram, give simple explanations what the new kilogram is conceptually, and explain how objects with exactly known masses can be realized using advanced technology.

Speaker: Wolfgang Ketterle, Massachusets Institute of Technology

See weblink for Zoom information.

Website: https://physics.stanford.edu/events/2021-robert-hofstadter-memorial-lectures

Cost: Free

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Friday, 04/16/21 7:30 PM

Tri-Valley Stargazers

Lick Observatory Back On Sky: 2020 Wildfire Recovery – Livestream

The 2020 wildfire season saw an unprecedented series of lightning strikes sparking fires across the Bay Area. Located on Mount Hamilton, outside of San Jose, Lick Observatory was directly threatened by these fires and, for the first time in its history, was forced to evacuate.

In this talk I’ll discuss the events leading up to the SCU Lightning Complex fire reaching Lick Observatory, the damage it caused to our site, and the resulting cleanup efforts before our return to operations.

Speaker: Joh Rees, Lick Observatory

See weblink for connection instructions

Website: https://www.trivalleystargazers.org

For non-members if you would like to join the meeting, please send an email to the club president at president@trivalleystargazers.org asking for the meeting link and telling us a bit about your areas of interest in astronomy.

Cost: Free

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Saturday, 04/17/21 7:30 PM

Mount Tamalpias Astronomy Lectures

Black Hole Portrait: How We Got Our First Picture – Livestream

Black holes are among the most remarkable predictions of Einstein’s theory of gravity: so much material is compressed into such a small volume that nothing, not even light, can escape. Black holes have also captured the public imagination, and are commonly featured in popular culture, from Star Trek to Hollywood movies. In Spring 2019, the multinational Event Horizon Telescope (EHT) released the first real (non-Hollywood!) picture of gas around a black hole and the “shadow” cast as that gas swirls in . How did the EHT do it, and what have its combined observations taught us about black holes?

Eliot Quataert, Princeton University

See weblink for Zoom information

Website: https://www.mttamastronomy.org/calendar#h.x0snkek9r9ue

Zoom: https://us02web.zoom.us/j/89697734661#success

Cost: Free

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Saturday, 04/17/21
09:00 PM – 10:30 PM

Chabot Space and Science Center

Virtual Telescope Viewing – Livestream

Join our resident astronomers on Facebook Live every Saturday evening live from Chabot’s Observation deck!

Each week, our astronomers will guide us through spectacular night sky viewing through Nellie, Chabot‘s most powerful telescope. Weather permitting we will be able to view objects live through the telescopes and our astronomers will be available for an open forum for all of your most pressing astronomy questions.

Other Dates For This Event:
• Saturday, 04/17/21
• Saturday, 04/24/21
• Saturday, 05/01/21
• Saturday, 05/08/21

Website: https://chabotspace.org/calendar/free-telescope-viewings/2021-01-02/

YouTube: https://www.youtube.com/channel/UCarFXs-04xmdHW_PVc7LWRg

Cost: Free

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Monday, 04/19/21 4:00 PM

What Physicists Do @ Sonoma State University

From Black Holes to Neural Networks – Livestream

Speaker: Dr. Louise Anderson, Google AI

Website: http://www.phys-astro.sonoma.edu/wpd/wpdcurrent.shtml

Zoom: https://SonomaState.zoom.us/j/87073719017

Cost: Free

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