Riverside Astronomical Society—Outreach, star parties, dark sky site, and you!
Next monthly meeting of the Riverside Astronomical Society

RAS Meeting

Saturday, August 25th (Regular Monthly)

GMARS 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.

  • 5:00PM – Pre-Meeting Dinner at Red Lobster Restaurant
  • 6:30PM – Beginner's Corner at Cossentine Hall at La Sierra University
  • 7:00PM – Monthly Meeting at Cossentine Hall at La Sierra University

Nightfall 2018

Nightfall Star Party 2018
November 1-4

Learn More >

Special Event
Join Warren Keller and Ron Brecher at Astro-Hutech in Lake Forest for 3 days of instruction on PixInsight

PixInsight Workshop
Warren Keller & Ron Brecher
September 28-30
Astro-Hutech in Lake Forest


Attend a Riverside Astronomical Society star party at the Goat Mountain Astronomical Research Station (GMARS) in southern California's Inland Empire
Calendar of events for the Riverside Astronomical Society
Next star party of the Riverside Astronomical Society–The best astronomy club in southern California!

Next Star Party

August 10th & 11th

Come out to enjoy the warm summer nights and air-conditioned houses! Join us at GMARS for our regular monthly star party.

GMARS star parties start Friday afternoon/evening and wrap up on Sunday morning. Be sure to join us for the potluck Star-B-Q on Saturday afternoon (roughly 60-90 minutes before sun down). We provide the dogs, burgers and fixings. You provide a sidedish, dessert or beverages!

A river of rain water flows through GMARS West on July 11, 2018.

Monsoonal rain on 7/11 put the "river" in Riverside Astronomical Society! GMARS received over 1" of rain that afternoon and the temperature dropped from 95° to 68° over the course of 2 hours! Click the image for a 1920x1080 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.