Multimedia Gallery
- Media Type: Illustration
The image shows accuracy to within a radius of about 148 feet (45 meters).
This artist's rendition of a new generation of GPS satellites.
GPS satellites are positioned in precise, circular orbits 18,000 kilometers (11,000 miles) above the Earth. They orbit once every 12 hours.
The shortest distance between two points on a globe is not always a straight line—it’s an arc called a great circle.
Guidance, navigation, and control are three central facets of managing a craft in space.
On October 8, 1943, the 100th Bomb Group targeted the heavily defended German industrial city of Bremen. The amazing tale of survival of Crosby and his crew drew media attention (including this illustration from Yank magazine).
The U.S. Exploring Expedition included a formidable group of botanists, naturalists, artists, taxidermists, and other scientists.
This sketch shows how the images of a star field and a globe were superimposed over what the astronaut observed through the window.
