Dudley Observatory

A young astronomer studies sunspots - Click to learn about our Education Programs

Preparing for a Star Party at the Octagon Barn

Star Parties are often held at the Octagon Barn - Click the learn more

Library of Documents and Books

The Dudley Observatory has an extensive his library of historical documents and rare books - Click to learn more

September 15th's Night Sky Adventure topic "Lunar Eclipse"

This Night Sky Adventure will prepare you for the September 28 total lunar eclipse when the Moon passes completely through the Earth's dark shadow. Click to learn more.

Welcome to the Dudley Observatory

Octagon Barn Lectures and Star Parties

Monthly Astronomy Talks & Dark Sky Star Viewing, Delanson, New York. Fridays in 2015.

Night Sky Adventures at miSci

Third Tuesday of the month. All ages welcome. $3 per person, $5 per family, miSci members free.

Rare Books including Kepler

Rare book plate from the Dudley Observatory collection
We were chartered by the State of New York in 1852, is the oldest independent organization in the United States supporting research and education in astronomy and the history of astronomy. Our library contains one of the world's finest collections of historically significant astronomical texts, including rare books of Copernicus, Galileo, and Kepler. The Dudley Observatory Archives is a fascinating collection of historical records pertaining to both astronomy and Albany.

The Dudley Observatory was founded through the generosity of those who saw our Capital Region as an economic and intellectual center, the "Tech Valley" of its day. In the last 150 years, the Dudley Observatory has periodically changed the focus of its work to reflect the needs of the community.

During the 20th century, Dudley Observatory astronomers achieved world class status with their accurate determination of the positions and motions of more than 30,000 stars. These observations form the sole example in the history of astronomy of the precise position and proper motion determination of all stars visible to the unaided eye with a single high precision telescope.
The current focus of the Dudley Observatory is on using astronomy to promote science education, with an emphasis on education, recruitment and early career development in science and technology. We have enjoyed a great deal of success with projects that fire the imaginations of the young, nurture them through the early stages of career development, and instill a life-long appreciation and enjoyment of science.