Astronomy Lecture: What’s Wrong with Right Ascension (RA)?

Please join the Mt. Diablo Astronomical Society for our September 23 general meeting featuring Jeff Adkins, an astronomy and physics teacher at Deer Valley High School in Antioch and Los Medanos College in Pittsburg, who will explain celestial coordinate systems including Altitude/Azimuth, Equatorial Right Ascension (RA) and declination (Dec), eliocentric and galactic coordinates, and how they relate to your telescope. He will answer questions like: Why is RA in hours and Dec in degrees? Why does RA count backward in the sky? And what do other coordinate systems have to do with it? The meeting starts at 7:15 p.m. with a short “What’s Up?” presented by MDAS President Tara Mostofi, who will discuss her Barcroft and Yosemite dark-sky adventures. Our meetings are held in the Lindsay Wildlife Experience Community Room, 1931 First Avenue, Walnut Creek, CA 94597
The Mt. Diablo Astronomical Society's past monthly lectures are available online on our YouTube channel: https://www.youtube.com/channel/UC0b_iOjsBldgdjs4aEOas_w?app=desktop
Check our web site www.mdas.net or email [outreachinfo@mdas.net](mailto:outreachinfo@mdas.net)