Answers to Planets Cyberhunt

·        Nine
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto

·        Smooth plains that resemble Lunar maria.
Intercrater plains, which are pocked with small craters and occupy about 70% of the surface that we have examined.
Rugged highlands that bear some resemblance to the corresponding regions on the Moon.

·        2^nd, 6th

·        Iron

·        Min- 150, Max- 310

·        90% hydrogen, 10% helium

·        Discovered by Galileo in 1610.

·        Spacecraft

·        Triton

·        1930