Description:
USNO's mission includes determining the positions and motions of the Earth, Sun, Moon, planets, stars and other celestial objects, providing astronomical data; determining precise time; measuring the Earth's rotation; and maintaining the Master Clock for the United States. USNO's Home Page includes historical information, as well as information about current programs, publications, and news.

URL:
http://www.usno.navy.mil/

Organization:
The U.S. Naval Observatory (USNO)

Cost:
Free over the Internet

Education Level:
General

Subject:
Astronomy

Resource Type:
Internet Site

Date Added to teachearth.com:
5/1/00