How do you tell time in space?
A boy stands in front of a drawing of a large clock

The information in this video was accurate as of the original publication date.

Audience: Educators and Students
Grades: 3-5


Learn about atomic clocks. See how cesium atoms make some of the best time-keeping devices.

How do you tell time in space?
Duration: 1 minute
> View QuickTime [6.49 MB]
Find this article at:
http://www.nasa.gov/audience/foreducators/topnav/materials/listbytype/How_Do_You_Tell_Time_in_Space.html