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Skywatcher Michael Mattiazzo got this image of comet Elenin, August 23, 2011, in the southern hemisphere.

Elenin: The Ex Comet

oberth

Hermann Oberth: German Father Of Rocketry

This close-up view of comet Hartley 2 was taken by NASA's EPOXI mission during its flyby of the comet on Nov. 4, 2010. It was captured by the spacecraft's Medium-Resolution Instrument.

Hartley 2: The 'Weird' Comet

SpaceX Dragon Commercial Cargo Craft

Space X: First Private Flights To Space Station

Comet Hyakutake

Hyakutake: Comet With A Long, Long Tail

Konstantin Tsiolkovsky

Konstantin Tsiolkovsky: Russian Father Of Rocketry

Comet C/2012 S1 (ISON)

Comet Ison: Incoming Sungrazer

robert goddard

Robert Goddard: American Father Of Rocketry

Comet Hale-Bopp

Hale Bopp Comet Facts

Milky Way skyscape over Mangaia

Milky Way Galaxy: Facts About Our Galactic Home

An image of Halley's Comet taken in 1986.

Halley's Comet: Facts About The Most Famous Comet

Hubble Space telescope captured comet Shoemaker-Levy 9 colliding with Jupiter. The planet’s gravitational pull ripped the comet apart, resulting in 21 visible impacts.

Shoemaker Levy 9: Comet's Impact Left Its Mark On Jupiter

Nicolaus Copernicus Biography: Facts & Discoveries

Clyde Tombaugh telescope

Clyde Tombaugh: Astronomer Who Discovered Pluto

gps network

Navstar: Gps Satellite Network

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