The noun form for the adjective zealous is zealousness.   The word zealous is the adjective form of the noun zeal.   Related noun forms are zealot and zealotry. 1 person found this useful.
Gravity on Jupiter: Jupiter is the largest and most massive planet in the Solar System. Its mean radius, at 69,911 Â± 6 km, makes it 10.97 the times the size of Earth, while its mass (1.8986Ã1027 kg) is the equivalent of 317.8 Earths.
Confidence votes 2.9K. The most terrestrial planet in our Solar System is Mercury as evidenced by Mariner 10 satellite that flew by Mercury 3 times during 1974 and 1975. A new satellite, Messenger, was launched in 2004 and will be orbiting Mercury next year.