7 Dec : Galileo changed the way we look at our solar system

World outside the world is super exciting. This is proved every time NASA has a mission. This time it’s Jupiter’s turn and that too for the first time.

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An unmanned NASA spacecraft ‘Galileo’ named in honor of Galileo Galilei, the Italian Renaissance scientist, was launched on October 19, 1989. It arrived at Jupiter today in 1995.
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The Galileo spacecraft was designed to study Jupiter’s atmosphere, satellites, and surrounding magnetosphere for two years.

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Circling the solar system’s most giant planet for eight years, Galileo beamed back a string of discoveries to Earth despite encountering several mechanical problems. It discovered evidence of saltwater below the surfaces of three moons – Europa, Ganymede and Callisto – and also got close to the infamous “pizza moon” Io as its volcanoes belched into the atmosphere.

When Galileo was almost out of fuel, NASA deliberately sent the spacecraft on a suicide plunge into Jupiter on Sept. 21, 2003.

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Galileo image of Earth, taken in December 1990
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The Moon by Galileo spacecraft
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The bright dot to the right of ‘951 Gaspra’ asteroid is its moon ‘Dactyl’

The spacecraft was the first to fly past an asteroid and the first to discover a moon of an asteroid. It provided the only direct observations of a comet colliding with a planet.

#Hindi
1995 में आज के दिन Galileo spacecraft ने बृहस्पति ग्रह पर लैंडिंग की थी। करीब 6 साल की लंबी यात्रा के बाद ये स्पेसक्राफ्ट बृहस्पति ग्रह पर पहुंचा था और इसने कई महत्वपूर्ण सूचनाएं धरती पर भेजी थीं।