See through the oldest public telescope in the country.
We are a fully functioning 19th century observatory used daily by the public and amateur astronomers, civic organizations, teachers and students, scouts and history buffs. We offer public astronomy programs and stargazing every Thursday & Friday evening and dozens of special events throughout the year.
When you explore the beautiful buildings and see through the large, historic telescopes, you'll step back in time and space.
Watch our New Video
The planet Mercury will cross in front of the Sun on May 9th.
Here's how you can Get Ready
Prepare your gear, take a picture, send it to us. Your guide to capturing the Transit of Mercury
Monday May 9 from 7:12am-2:42pm
The hottest ticket at the Observatory - spend a romantic night under the stars (and Mars!)
Join, donate, and volunteer to make the "Birthplace of American Astronomy" a vibrant center for education and wonder
See "What's Up" at the Observatory. Each season has a new planet, star cluster, or nebula to explore
Plan a field trip, schedule an outreach visit to your classroom, or gather the scouts for an evening at the Observatory