Sonoma Sun Event Calendar

Observatory Focus Night Robert Ferguson Observatory

Thursday October 20th - 7:00pm

Have you ever wondered what’s really out there in the night sky? Focus Night at Robert Ferguson Observatory (RFO) allows you to zoom in on cosmic marvels with local astronomers at your elbow, showing the way and answering your questions in plain language.

This month’s Focus Night, Oct. 20, starting at 7 p.m., will take an in-depth look at Neptune, a gas giant that has the fastest winds ever recorded in the solar system and is home to many moons. It is a couple of billion miles away but we can see it in the telescope. It marks a boundary of space where objects known as TNOs (Trans-Neptunian Objects) exist, and the story of its discovery is as entertaining as it is interesting. Neptune is known as the unseen planet that was discovered without a telescope.

Tickets are $25 at

Focus Night starts in the classroom and moves outside to three different telescopes for a direct look at the evening’s topic. RFO’s newest telescope, with a 40-inch reflector, is one of the largest public telescopes in California. For information such as directions, parking, arrival times, rain dates (rain date is Oct. 26) and more, go to and click on the “Focus Night” tab.