It the mass of a body were doubled, its gravity would become 4 times stronger.
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Q1: Mercury, with a higher eccentricity orbit, should
Q2: Transits of Venus were critical in early
Q4: Kepler based his theories on the precise
Q4: All the jovian planets lie beyond the
Q7: The parallax shift of a star would
Q9: Newton's modification of Kepler's Third Law lets
Q12: Galileo's observations of the entire phase cycle
Q16: Newton's Laws completely replaced the incorrect work
Q19: Like the Sun and the Moon, the
Q20: Galileo's observations of sunspots proved the Sun
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