About SFAA Live-streamed Lectures

Once monthly, the SFAA hosts distinguished guest speakers who are leaders in the fields of astronomy, physics and related disciplines. The speakers present to the public and SFAA members the latest developments from cutting-edge scientific programs.   To view archived lectures, click here.

Due to the COVID-19 pandemic,  the monthly lectures are being made available by live stream.  Use your computer or mobile device to connect to the links provided below.


15 June 2022, 7:00 PM, Wednesday, Live-streamed via Zoom, YouTube and Facebook

“Measuring the Beginning of Time From the Bottom of the World”


Cyndia Yu, Stanford University Department of Physics, KIPAC

Measurements of the afterglow of the Big Bang, the cosmic microwave background, have allowed physicists to piece together much of our modern understanding of the origin, composition, and evolution of the Universe. Future measurements hope to answer tantalizing questions ranging from the transient nature of the radio sky to the earliest moments of the Universe itself. I will give a brief introduction to the cosmic microwave background and what we can learn from it. I will then describe some of the telescopes we build to make these measurements and the premiere astronomical observing sites we use to house our experiments.

Brief Bio

Cyndia Yu is a PhD student in physics at Stanford, where she works on building new tools to study the astroparticle universe. She is involved in cosmic microwave background (CMB) experiments around the world, including the BICEP/Keck experiment series, the South Pole Observatory, the Simon's Observatory, and CMB-S4, where she has done everything from designing and testing new detector systems to thinking about new ways to analyze CMB data to learn about the Universe. As a National Science Foundation Graduate Research Fellow and Stanford Enhancing Diversity in Graduate Education Fellow, she is especially interested in communicating the joys of her work to diverse audiences and striving to make physics accessible to students of all backgrounds.

How to Attend

To attend the virtual meeting "live" with the opportunity to ask questions:

Connect starting at 6:30pm on Wednesday, June 15th by clicking this Zoom meeting link: https://zoom.us/j/95830904603?pwd=UDNKdm16US9wK1EremdJeGptdjNNdz09

Clicking the link may prompt you to install the Zoom virtual meeting app. Once installed, you will be able to join the meeting. If the app is already installed on your device, simply enter the meeting number 958 3090 4603 and password 116064 to join the meeting.

Once joined, you can test your audio and video, and greet other members.

Board members will join the meeting early to help troubleshoot any problems with audio or video.

"Doors Open" at 6:30pm and the announcements and lecture will start promptly at 7:00pm.

Alternatively, please visit the following channels to attend the live stream:

SFAA YouTube channel: https://www.youtube.com/channel/UChuBJGp_iJYZ11q_ayA-q3A

SFAA Facebook: https://www.facebook.com/groups/152754481404310