Multimedia Gallery
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- Topic: Timekeeping
Displaying 21 - 30 of 56
Film
Length: 7 Minutes, 3 Seconds
Artifact
A post-war periscopic sextant often mounted this type of watch.
Animation
Length: 1 Minute, 8 Seconds
Film
Length: 3 Minutes, 10 Seconds
Illustration
Increasingly accurate clocks and improved navigation methods have allowed navigators to calculate spacecraft positions with greater accuracy.
Illustration
Portrait of John Harrison by James King, about 1766.
Artifact
The Lindbergh Hour Angle Watch eliminated a simple but troublesome calculation in celestial computations.
Document
These watches were often more popular for their use as fashion accessories than their practical application as navigational tools.
Artifact
Uses sidereal (star time), with a day of 23 hours, 56 minutes, 4.1 seconds long.
