Hubble Space Telescope:
For more than a decade, the Hubble Space Telescope has dazzled with
stunning pictures of stars, galaxies and planets both in our solar
system and beyond. The telescope orbits Earth at an altitude of 612 km
(380 statute miles) at 28,000 kph (17,500 mph). At that speed, one orbit
takes only 97 minutes.
In order to take images of distant, faint objects, Hubble must be
extremely steady and accurate. The telescope is able to lock onto a
target without deviating more than 7/1000th of an arcsecond, or about
the width of a human hair seen at a distance of 1 mile.
Visit the Hubble Space Telescope Website