The nineteenth century home, located at 1 Observatory Circle, is on the grounds of the U.S. Naval Observatory, which serves as a hub for astronomical research on all things in the sea, on land and ...

Here’s how it works. An ancient and enigmatic stone circle in the Middle East may not be a prehistoric astronomical observatory after all, according to a new study of satellite images.

The home is at 1 Observatory Circle, on the grounds of the US Naval Observatory. AP Set on 12 acres of the 72-acre observatory, the white, three-story mansion features a wraparound porch ...