Sonoma Sun Event Calendar

Solar viewing, star party Robert Ferguson Observatory

Saturday April 21st - 11:00am

On April 21, solar viewing runs 11 a.m.- 3p.m. at the Robert Ferguson Observatory. View Earth’s closest star and learn about sunspots, prominences, flares and more. Observe with both visible light and radio telescopes. Free. Then, a Star Party starts at dusk (8 p.m.) when the Observatory’s three main telescopes are open for viewing and presentations on astronomical topics will be given throughout the evening. Additional telescopes will be set up in front of the building and friendly and knowledgeable docents are available to answer your questions. $3 at the door. Find out more at