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On This Date in History - September 7

From Nick Greene, for About.com

Daily Extra :
Astronomy & Space Word of The Day

Trojan: An object orbiting in the Lagrange points of another (larger) object. This name derives from a generalization of the names of some of the largest asteroids in Jupiter's Lagrange points: 588 Achilles, 624 Hektor, and 911 Agamemnon. Saturn's satellites Helene, Calypso and Telesto are also sometimes called Trojans.

Today in History:
1958: Black Knight missile of the United Kingdom was launched from the Australian range at Woomera to an altitude of over 300 miles.

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