On this day in 2003 - September 21st - NASA's Galileo mission ended its mission by plunging into Jupiter.

Galileo was the first spacecraft to orbit Jupiter, the first to achieve an asteroid flyby (951 Gaspra), and it discovered the first asteroid moon - Dactyl, around asteroid 243 Ida.

Mona Evans
For news, activities, pictures and more, sign up to the Astronomy Newsletter!