Tri-Valley Stargazers, Livermore CA

The Tri-Valley Stargazers Astronomy Club, Livermore CA, welcomes you. There is a lot of information here on the many activities of our club. Learn why you should join the club to get the most out of your amateur astronomy hobby in the east San Francisco Bay Area.

The Tri-Valley Stargazers Privacy Policy is available here.

Please read the latest about our Health rules:

Board elections are coming up

We will soon be electing new members for the board. Please nominate candidates to replace old members who will be retiring this year.

Next Public Meeting

Friday, April 18, 2025 at 7:30 p.m.

Unitarian Universalist Church
1893 N. Vasco Rd., Livermore

Topic: Binary Stars
Presenter: Dr. Catherine Clark

This will be a hybrid meeting. The meeting will be held in person at the Unitarian Church and will also be available via Zoom.

Summer Barbecue

Saturday, June 22, 2024

Set up at 4:00 p.m.
Dinner starts at 5:00 p.m.

Unitarian Universalist Church
1893 N. Vasco Rd., Livermore

Winter Solstice Potluck

Friday, December 20, 2024

Set up at 6:30 p.m.
Dinner starts at 7:00 p.m.

Unitarian Universalist Church
1893 N. Vasco Rd., Livermore

Outing to Del Valle
Friday, July 19th at 7:30 p.m.
Details below.

Next Board Meeting

Monday, April 21, 2025, 7:30 p.m.

Board meetings are usually held using video conferencing. Members are always welcome at board meetings.

The Latest News & Upcoming Events

Important Annoucement - The IRS has revoked our 501(c)(3) status due to an error in our filings for the years 2020-2022. We're addressing this issue and are working on our reinstatment retroactive to 2022. We anticipate success but will keep you informed. But for the moment we are not eligible for charitable donations.

April 2025 Member Meeting Presentation

This meeting will be live at the Unitarian church and will also be available using the video conference utility Zoom. The meeting link will be emailed to members. For non-members if you would like to join the meeting, please send an email to asking for the meeting link and telling us a bit about your areas of interest in astronomy.

Upcoming star partiesgroups.io

For a complete and up-to-date calendar of upcoming events, visit our groups.io calendar.

Please contact for further information.

June's meeting

Our June meeting will be our annual Summer BBQ. Plan on working up an appetite by helping to set-up and get the charcoal going at about 5:30pm. We will start eating around 6:00pm.

The club will provide hamburgers, hotdogs and vegetarian black bean burgers, along with a variety of toppings. If you wish, provide side dishes for your family, but not to be shared with members because of COVID.

December's meeting

This month is our Holiday dinner. We'll be opening the doors at 6:30 to set up the tables and chairs, and then the feast will begin at 7:00 PM. TVS will provide the drinks and paper/plasticware. In addition we will provide the main course for this month's holiday celebration, possibly turkey and/or tri-tip. Members are asked to bring a dish to share, and of course bring family and friends to share in the festivities. Based on the first letter of your last name members are asked to bring a dish to share:

A-D Macaroni, Potato, Green or Fruit Salad
E-J Vegetable or Beans
K-O Appetizer
P-Z Dessert

H2O Open House

Our next open house is September 28, 2024 for the club's dark sky site, Hidden Hill Observatory, aka H2O.

Anyone can come to our open houses, not just club members; but you cannot go there without an escort. We will meet at the corner of Mines and Tesla Roads at 5:00 PM, then caravan to the site on a drive that takes about 50 minutes. The admission is $3/car; please bring the exact amount. There is no gas on the way, so be sure to gas up before leaving. The site is essentially in the wilderness, so there is no electricity and water, and there are only a couple of pit toilets. Cell-phone reception is iffy at best. While there is a picnic table there, you really should bring your own chair. If you need to see what you are doing, bring a red LED flashlight, not a white-light flashlight. And use masking tape over your car door and interior lights, or pull the fuse. If you don't have a scope, you can always find someone who is willing to let you look through theirs. And don't forget to bring your binoculars. Expect to stay until about midnight and get back to Livermore at around 1:00 AM.

Member star parties at Tesla Vineyard

4/19/25

Tesla Vintner star parties are generally open to club members and their guests. The star parties will run from 7:00 PM until midnight. Tesla Vintners is in Livermore near the intersection of Tesla and Mines. For those new to the site, please use the unmarked west entrance (closest to Mines) to enter the winery grounds.

We continue to rebuild the Hidden Hill Observatory

Our latest change is to add a shed for storing tools and portable telescopes. Click on this image to see more pictures of our progress:

TVS Crystal Wine Glasses For Sale

TVS is offering elegant crystal wine glasses for sale to club members. You don't have to drink wine to enjoy the beautiful TVS logo-etched stemware. Use them for your favorite beverage, or they can be used as a beautiful container for small plants. They are the perfect gifts for loved ones or friends. Look for them at club meetings, where they will be sold for $10/each. Don't drink alone, buy two! Support TVS. Thanks to who got these wonderful glasses.

TVS Logo Wear

You may have seen some TVS members wearing shirts, caps and jackets embroidered with the TVS logo. If you are interested in obtaining an embroidered logo item, you can do so by ordering whatever you would like through Land's End's Corporate Sales section and specifying TVS logo #0118948. You will need to set up an account, which will ask for the logo number and the TVS customer number (3452021). Before you order a cap, you might want to check with Roland, who has ordered several to get a discount price.