In 1769, an international scientific effort was organized to observe a transit of Venus in order to determine the size of the solar system. This rare event, when Venus passes in the front of the Sun’s disk, makes such calculations possible when measured from widely separated sites. The American Philosophical Society sent Owen Biddle and Joel Bailey to Lewes from Philadelphia to establish a temporary astronomical observatory to record the transit on June 3, 1769. Their observations, combined with measurements from other astronomers, placed Lewes in the forefront of 18th-century astronomy. The observatory was located near this site.
Installed in 2015.
The Honorable Ernesto B. (Ernie) Lopez, Delaware State Senate, 2015
611 Savannah Road, Lewes, DE 19958
Related Topics: American Philosophical Society, Astronomy, Historic Location, Historical Markers, Joel Bailey, Lewes, Observatory, Owen Biddle, Sussex County, Transit of Venus Observatory, Venus
Delaware's Governor
State Directory
Elected Officials
General Assembly
Delaware Courts
State Employees
Cities & Towns
Delaware State Code
State Regulations
Business First Steps
Phone Directory
Locations Directory
Public Meetings
Voting & Elections
Transparency
Choose Health DE
Tax Center
Personal Income Tax
Privacy Policy
Weather & Travel
Contact Us
Corporations
Franchise Tax
Gross Receipts Tax
Withholding Tax
Guides to Services
Help Center
Mobile Apps
E-mail / Text Alerts
Social Media
Built by the Government Information Center
©MMXXIV Delaware.gov
