Science Buddies
Science Buddies: Which Stars Can You Use for Navigation
A great science project from Science Buddies that examines how ancient peoples navigated without the benefit of a GPS. Find out which stars are important in navigation in the northern and southern hemispheres. The Science Buddies project...
Other
The Royal Observatory at Greenwich: Homepage
This site from The Royal Observatory at Greenwich is a very historically important astronomical observatory. The site has a combination of information about astronomy, longitude and time. Information written in highly accessible...
Institute and Museum of the History of Science
Museo Galileo: Multimedia: Video: Astronomical Use of the Plane Astrolabe
Invented in ancient Egypt, the plane astrolabe is a tool used by astronomers and navigators to determine time and identifying positions of the Sun, Moon, stars, and planets. Read text or view the video to understand the details of its...