Goodbye, Galileo: NASA's Historic Jupiter Mission Comes to an End

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NASA's Galileo spacecraft concluded its mission on September 21, 2003, by plunging into Jupiter at high speed, marking the end of a highly successful exploration of the gas giant. Launched in 1989, Galileo completed 35 orbits around Jupiter, far exceeding its initial goal of 11. The mission achieved significant scientific milestones, including the discovery of liquid oceans on three of Jupiter’s moons and the first close-up images of an asteroid. Galileo also provided valuable data on Jupiter's atmosphere and its complex ring system. The spacecraft's legacy includes over 10,000 images and numerous discoveries that have advanced our understanding of the Jovian system.
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On Sunday afternoon, September 21, 2003, the Galileo spacecraft was plunged into Jupiter at over 100,000 miles per hour, thereby ending one of NASA’s most successful planetary missions yet.

http://www.space.com/scienceastronomy/galileo_finale_030921.html
http://www.cnn.com/2003/TECH/space/09/21/galileo.crash/index.html
http://www.cnn.com/2003/TECH/space/09/19/coolsc.farewell.galileo/index.html

SUMMARY TIMELINE
1977 – congressional approval of the mission
1989 – launch from the Space Shuttle Atlantis
1990 – flybys/gravity assists of/from Venus & Earth
1991 – flyby of the asteroid Gaspra in the asteroid belt
1992 – second Earth flyby/gravity assist
1993 – flyby of the asteroid Ida + Dactyl
1995 – achieved orbit around Jupiter
2002 – final scientific mission (flyby of the small moon Amalthea)
2003 - End of mission. Kept on sending data until the end.

SOME OF ITS MANY SUCCESSES
- - Completed 35 orbits of Jupiter instead of just the planned 11
- - En route to Jupiter, it completed successful flybys & measurements of the Earth, Venus, & 2 asteroids
- - At Jupiter ,it withstood much more radiation than it was designed to take
- - Achieved the majority of its science objectives and made a number of serendipitous discoveries along the way
- - First close-up images of an asteroid (Gaspra)
- - First discovery of a tiny moon in orbit around an asteroid (Ida & Dactyl)
- - Imaged the Shoemaker-Levy 9 impact (views of the planet's far side that would have otherwise remained unseen)
- - Found evidence that three of Jupiter’s moons (Callisto, Europa and Ganymede) have liquid oceans (which led to speculations that they could harbor ET life)
- - Galileo released a probe into Jupiter’s atmosphere which transmitted data about the planet's chemical composition, winds, clouds and natural radiation environment.
- - Well over 10,000 images taken
- - Helped chart the structure of Jupiter’s Gossamer Ring (yes, Jupiter has rings too!)
- - First flyby of the small moon Amalthea
- - Found ~300 volcanoes on the moon Io
- - Overcame several technical problems (main antenna malfunction, damages from Jupiter’s extreme radiation, etc.)
 
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