Galileo's top 10 science results
FROM NASA PRESS KIT
Posted: September 20, 2003
1. The descent probe measured atmospheric elements and found that their relative abundances were different than on the Sun, indicating Jupiter's evolution since the planet formed out of the solar nebula.
2. Galileo made a first observation of ammonia clouds in another planet's atmosphere. The atmosphere seems to create ammonia ice particles of material from lower depths, but only in "fresh" clouds.
3. Io's extensive volcanic activity may be 100 times greater than that found on Earth's. The heat and frequency of eruption are reminiscent of early Earth.
4. Io's complex plasma interactions in Io's atmosphere include support for currents and coupling to Jupiter's atmosphere.
5. Evidence supports a theory that liquid oceans exist under Europa's icy surface.
6. Ganymede is the first satellite known to possess a magnetic field.
7. Galileo magnetic data provide evidence that Europa, Ganymede and Callisto have a liquid-saltwater layer.
8. Europa, Ganymede, and Callisto all provide evidence of a thin atmospheric layer known as a 'surface-bound exosphere'.
9. Jupiter's ring system is formed by dust kicked up as interplanetary meteoroids smash into the planet's four small inner moons. The outermost ring is actually two rings, one embedded with the other.
10. Galileo was the first spacecraft to dwell in a giant planet magnetosphere long enough to identify its global structure and to investigate its dynamics.
Timeline - Times and descriptions of Galileo's descent into Jupiter.
Entry preview - Story on Galileo's demise.
Mission overview - A look back at Galileo's voyage.
Spacecraft - A technical review of the Galileo spacecraft.
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