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Mercury's most unusual orbital feature, as compared to the other planets, is:
the shape of its orbit
what is the reason that it is so difficult to view Mercury from Earth?
Mercury is always very close to the sun
Mercury experiences extreme high and low temperatures between night and day because:
it has no atmosphere to moderate temperatures over the globe
what is thought to have caused the craters on Venus?
Most are volcanic in origin; some are due to meteoritic impacts
Why are Mars' seasons more extreme than those of the Earth?
Mars's orbit has a much greater eccentricity than the orbit of Earth
How does the density of Jupiter compare to the terrestrial planets?
Its density is less than any terrestrial
Which of these is True about the seasons of Uranus?
It's strange tilt produces extreme seasonal variations, especially at the poles
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