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.


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.
The Galileo spacecraft was designed to study Jupiter’s atmosphere, satellites, and surrounding magnetosphere for two years.

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.

Galileo image of Earth, taken in December 1990
The Moon by Galileo spacecraft
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.

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।