Image Gallery

Gravity Probe B and Space-Time
 
 
Artist concept of Gravity Probe B orbiting the Earth to measure space-time

Artist concept of Gravity Probe B orbiting the Earth to measure space-time, a four-dimensional description of the universe including height, width, length, and time.

Image credit: NASA

+ View large image
 
 
Find this article at:
 
http://www.nasa.gov/mission_pages/gpb/gpb_012.html