2007-01-14 01:32:31 · 11 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Large astronomical bodies are approximately spherical because their gravity acts equally in all directions towards their centre of mass.
Cheers.
2007-01-14 01:39:45 · answer #1 · answered by chopchubes 4 · 0⤊ 0⤋
The most stable shape of a 3-dimensional object, where the volume-surface area ratio is the highest, is a sphere. This is why water droplets are round too.
Gravity has a limited effect too by drawing mass as close as it can to the center of gravity.
It has nothing to do with the spin of the planets. The Moon has a very slow rotation and it is still a spheroid. The spin will actually make a planet deviate more from a spherical shape causing it to bulge at its equator and flatten at the center of axis.
2007-01-14 02:55:36 · answer #2 · answered by gebobs 6 · 0⤊ 0⤋
The perfect object to spin is a circle so gravity acts until a planet becomes a perfect sphere. Plus I told God "They should be round". And he said "cool".
2007-01-14 01:38:24 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Gravity caused by mass on a gas, then liquid that hardens. Commonly known as implosion. Mass at the center sucks in lighter materials euqally around the cercumfrance, with minor flucutations.
2007-01-14 04:25:13 · answer #4 · answered by Anonymous · 0⤊ 0⤋
the general rolling action and spinning around the centre gravitational force like in our case the sun keeps tint peices being sent spinning off into space. the equal spinning means that equal amounts will be sent off
2007-01-14 06:11:42 · answer #5 · answered by chaggy 1 · 0⤊ 0⤋
You spin me right round baby right round
like a record baby
right round round round
2007-01-14 02:19:54 · answer #6 · answered by Anonymous · 0⤊ 0⤋
A combination of gravity and pressure.
2007-01-14 01:37:59 · answer #7 · answered by CLICKHEREx 5 · 0⤊ 0⤋
dont be square its called gravity.Speed of planets rotating also.
2007-01-14 01:37:44 · answer #8 · answered by zanydumplings 3 · 0⤊ 1⤋
They are not actually round. they are kind of ovallish. But I'm not sure why.
2007-01-14 01:39:56 · answer #9 · answered by AD 4 · 0⤊ 0⤋
Ooh, what's that? The 15th time this week that this was asked?
2007-01-14 02:30:08 · answer #10 · answered by Anonymous · 1⤊ 0⤋