2007-02-02 22:39:17 · 19 answers · asked by barbara a 1 in Science & Mathematics ➔ Earth Sciences & Geology
because its just another planet like all the rest and all the other planets are round so why be the odd one out? lol i was using my initiative to answer that so i don't blame you if it sounds stupid lol
2007-02-02 22:42:13 · answer #1 · answered by <3 skittles <3 2 · 0⤊ 0⤋
The Moon was formed at a similar time to the Earth. A proto-planet about the size of Mars collided with the Earth and threw up a large amount of material. This collated together under it's own gravity to form the Moon. Since gravity pulls equally in all directions it formed a sphere. The Moon has a small core of Iron. This is due to iron being denser than the other elements and sinking to the middle.
2007-02-02 23:22:14 · answer #2 · answered by Chris P 2 · 0⤊ 0⤋
Because its large enough to do so, when a body is still in a molten {hot liquid}state, it exerts a gravitational force upon its self!..This force is equal in all directions and naturally falls inward or down toward a point called the 'centre of gravity'!..This pulls all the matter in the object toward this 'centre' equally, the force of gravity is really a quite weak force, but if theres enough of it, it pulls everything toward it centre thus making a ball or a rounded planet !..some space objects start off not being strong enough to form a round shape, but through what we call accreation, that is the gathering of passing dust, space rocks and gas through its light gravity, it gets bigger and bigger until it has enough material to collapse under gravity to form a planetary of star shape!..Stars form this way by accreating hydrogen gas, so much of it that the hydrogen atoms get squeezed together and 'fuse' into a thermonuclear reaction, just like our sun!..And its all done by gravity!
2007-02-02 23:16:55 · answer #3 · answered by paranthropus2001 3 · 1⤊ 0⤋
Who ever said the moon was round, it is a planet like any other
except it does not has no atmosphere it also changes shape from time to time
2007-02-02 22:44:50 · answer #4 · answered by Rui C 2 · 0⤊ 1⤋
Yep! Definately Gravity
2007-02-02 22:45:10 · answer #5 · answered by Antman 3 · 0⤊ 0⤋
gravity I reckon, like the earth. It may seem like space when those muppet astroheads are bounding across the moondust but they will always be pulled back down, millions of years of rotation and the circular pull of centre. Actually Anyone know what's at the centre of the moon. It' cant all be dust
2007-02-02 22:44:20 · answer #6 · answered by bavwill 3 · 0⤊ 0⤋
My very personal and quite simplified idea about it, is, that all spinning objects tend to be round.
So is the earth too.
Not perfectly round but more or less, so.
I think it has to do about less resistance.... and then the external particules which are not fixed are send packing due to the rotation of the object!
2007-02-02 22:46:27 · answer #7 · answered by klaartedubois 4 · 0⤊ 2⤋
Because, at this scale, gravity is the main force and has no directional preference. So objects build under gravity are sphericals (if there are big enough).
2007-02-02 22:45:20 · answer #8 · answered by Scanie 5 · 0⤊ 0⤋
You will probably find that the planets are not perfectly round. They are more ellipsoidally shaped due to gravitation, other planets pull etc etc...
2007-02-06 08:14:04 · answer #9 · answered by Anonymous · 0⤊ 0⤋
a good question,
but it's only round for a couple of days each month,,and as we have never seen the other side ,couldn't it be egg shaped?.
who has the proof that it'a sphere in all it's senses ,
have a nice day,,
2007-02-02 22:55:57 · answer #10 · answered by mike 3 · 0⤊ 1⤋