Solar and Star Parties


Star Parties: Please arrive within 3 hours after start time to ensure that we remain
open for you.

April 18
Solar 11am
Star Party 8pm

May 2
Solar 11am
Star Party 8pm

June 13
Solar 11am
Star Party 8pm

July 18
Solar 11am
Star Party 8pm

August 15
Solar 11am
Star Party 8pm

September 26
Solar 11am
Star Party 8pm

October 17
Solar 11am
Star Party 7pm

November 14
Solar 11am
Star Party 6pm

November 27
Solar 11am
Star Party 6pm


The Universe is Here
for You!

Crab Nebula

Guests attending a Saturday Star Party. Photo: Len Nelson

The Robert Ferguson Observatory (RFO) is open to the public at least once a month, usually on a Saturday near the time of the New Moon (see schedule at left).

Daytime Solar: Solar telescopes are set up so you can safely look at and listen to our favorite star, the Sun.

Star Parties: Presentations on astronomical topics are given in the classroom throughout the course of the evening. Starting at dusk, the Observatory's three main telescopes are open for your viewing. Docents set up additional telescopes in front of the building. Friendly and knowledgeable docents are available to answer your questions.


  1. Map and Directions
  2. When to arrive: We keep the observatory open as long as there are visitors, but you must arrive within 3 hours after start time to ensure that we remain open for you. Summer Star Parties begin with tours and presentations until it's dark enough for observing.
  3. Bring warm clothing, even in summer—observing is done outdoors.
  4. There is a short walk from the parking area to the Observatory and you may wish to bring a small flashlight.
  5. White Light: No white lights should be used after dark; the observatory is a red-light-only area to protect everyone's night vision. We will supply red cellophane to cover flashlights. Please note:
    ◦ Bring a SMALL flashlight (large camp lanterns, light sticks, etc., cannot be adequately covered by red cellophane).
    ◦ Cell phones or cell-phone flashlights are acceptable but must be covered in red cellophane. (No cell service at the observatory).
    ◦ Some head lamps are difficult to cover with red cellophane. Once covered, head lamps should be worn around the neck or used pointing down as they are usually very bright at eye level.
    ◦ Red flashlights are available for $5 at the observatory.
  6. Alcohol is prohibited on Observatory grounds.
  7. The Observatory is not open to the public except for scheduled events.

Classroom presentations are always offered on Star Party nights even if the weather is poor. For current conditions call the observatory at 707/833-6979, or click on this link: Clear Skiy Chart

Clear Sky Chart


RFO in the daytime

The Robert Ferguson Observatory: Both peaked roofs roll back to reveal the telescopes inside. The dome opens and revolves with its telescope. The tall poles attached to the sides of the building are part of RFO's radio astronomy set-up that allows us to listen to the Sun. Photo: Mark Hillestad

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at RFO

Looking through the big telescope

M1, the Crab Nebula: photo by RFO docents using RFO's robotic telescope. more images



Observatory Admission:

Daytime Solar
Observing is Free

Star Party is $5.00 per adult (18 and older),
under 18 FREE.

State Park Parking Fee:



"What a fantastic experience in every way possible. All ages. The best educational and 'out of this world' journey in the Bay Area."

We were at the observatory on Saturday night...we had an AMAZING time. Most people took off after the fog came in, so that gave us a great opportunity to hang around and pick the brains of the docents. Such knowledgeable, friendly people with such fascinating information! Thank you for a great Saturday night!

"Fun stuff!
Loved the excellent presentations!"

"The big telescope that takes images was so cool. Mr. D
was so insightful! WELL DONE."

"This place is beautiful and the docents breathe life into the study of Astronomy making it tangible, impressive, understandable, and the docents are just as in awe as you are."