Riverside Astronomical Society—Outreach, star parties, dark sky site, and you!

Next Virtual Club Meeting

Saturday, September 25th

RAS monthly meetings are your opportunity to attend free presentatons by professional astronomers, catch up on club business, and hear about the latest happenings in the night sky (sometimes, the daytime sky too). Our general meetings are always free and open to the public.

For the foreseeable future, we are continuing to hold virtual meetings via WebEx. Information to join will be provided approximately 3-7 days prior to the next meeting.

Nightfall 2021

Nightfall 2021 is coming up!
November 4-7, 2021

Details >

Attend a Riverside Astronomical Society star party at the Goat Mountain Astronomical Research Station (GMARS) in southern California's Inland Empire
Join the best astronomy club in southern California—the Riverside Astronomical Society!

Special Rates for
New Members!


  • Individual: $20
  • Family: $25
  • Student: $20

(Your membership will be valid through 6/2022!)

MORE INFO >

Calendar of events for the Riverside Astronomical Society
Quick links for browsing your way through RivAstro.org—The RAS Website—and getting to other sites

Next GMARS New Moon Weekend

October 1st thru 3rd

While we're still not ready to have a our normal star parties, we continue to have "modified" star parties during this ongoing period of COVID-19 related health concerns. The GMARS houses will be open but we will not have a starbecue or any organized activities. Visitors are expected to have their own food, beverages, and sleeping arrangements. Please also note that visitors are expected to observe social distancing and sanitation guidelines as outlined here.

The Double Star Cluster in Perseus by Glenn Diekmann.

The Double Star Cluster in Perseus by Glenn Diekmann. Click the image for a larger version.

RAS Calendar of Events

Ask the Outreach Director to add an event to the calendar. View larger calendar.

The scene at a GMARS Star Party. Join the Riverside Astronomical Society in Landers at our next star party! Photo by Michael Bauer.