what explains the differences in the periods of planetary revolution?

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what explains the differences in the periods of planetary revolution?

2007-03-03 22:14:35 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space

3 answers

Newton's law on orbiting bodies.

2007-03-03 23:37:33 · answer #1 · answered by Billy Butthead 7 · 0⤊ 0⤋

Planets are pulled round in their orbits by their star's gravity. The further away they are, the weaker the pull, so they don't move as quickly. Being further away their orbits are also longer, so it's a double whammy!

2007-03-04 07:25:53 · answer #2 · answered by Iridflare 7 · 0⤊ 0⤋

Their distance from the sun. Nothing more or less.
Since orbits are (slightly) elliptical, the distance and speed changes throughout each orbit.

2007-03-04 06:21:01 · answer #3 · answered by Matthew P 4 · 0⤊ 0⤋