Skip to content
79,433 pages · 13,741 images · since 1994 Browse A–Z Today in space history
Encyclopedia Astronautica The full story of spaceflight

Encyclopedia Astronautica

Solar System A cliff on Uranus’s moon Miranda is about six miles high, and because gravity there is less than 1% of Earth’s, anyone who stepped off the top would fall for around eight minutes and reach the bottom at roughly highway speed
  1. 1962OAO sensors Ultraviolet astronomy mission
  2. 1973Aeronomy/Plasma mission
  3. 2006XM-Blues
Full calendar