Daily Extra :
shepherd satellite: (Also 'shepherd moon') A satellite which constrains the extent of a planetary ring through gravitational forces.
Who Was Born Today?:
1926: Lev Stepanovich Demin, Russia, cosmonaut, Soyuz 15
Who Died Today?:
Today in History:
1787: Uranus' moons Titania and Oberon discovered by William Herschel.
1975: Soyuz 17 carries 2 cosmonauts to space station Salyut 4
1978: Soyuz 27 links with Salyut 6 and Soyuz 26 (1st time 3 spacecraft link)
1996: Space Shuttle STS 72 (Endeavour 10), launches into space
1997: Telstar 401 Satellite Fails
1998: Lunar Prospector - USA Lunar Orbiter arrived at the Moon. It is designed for a low polar orbit investigation of the Moon, including the mapping of surface composition and possible ice deposits, the measuring of magnetic and gravity fields, and the study of lunar outgassing events. This data could help scientists plan a potential lunar base and develop theories of the formation of the Moon, Earth and Solar System. Its mission is scheduled to last one to three years.
