2006-09-03 01:55:34 · 14 answers · asked by hani h 2 in Science & Mathematics ➔ Astronomy & Space
Gravity is always pulling everything together, and as all that matter struggles to get to the center, the result is a sphere. If there were a cube, the corners would be crushed down "flat" against the surface. Since "down" is toward the center of the mass, the natural shape is a sphere.
2006-09-03 05:27:32 · answer #1 · answered by campbelp2002 7 · 1⤊ 0⤋
Planets are spherical in shape because of their rotation and the gravitational tug on their mass.
The spin causes the planet to buldge slightly at the equator, as the centrifical force pushes against the gravitional tug towards its core.
The pull of gravity works to pull everything down equally, so as more matter is pulled together, the core exerts a stronger pull which tugs even more mass towards it until its own mass has smoothed it out enough to be seen as a sphere.
2006-09-03 13:45:27 · answer #2 · answered by Jonathen 2 · 1⤊ 0⤋
Not every object in the Solar System is spherical. The asteroid 10 Hygiea (the 4th biggest asteroid after Ceres Pallas and Vesta) is oblong shaped.
The recent IAU definitions of planet and dwarf planet do require a spherical shape to qualify an object as either of those. If they aren't speherical they will oresumably be in the "small Solar System bodies" category instead.
2006-09-03 09:37:18 · answer #3 · answered by Anonymous · 0⤊ 1⤋
When planets are formed, they are very hot (either gaseous or molten), and, as they have been thrown out by stars, they are rotating on their axes, this means that due to the gravity in their mass, and the centrifugal forces of the rotation, that they re shaped into the roughly spherical shapes that you see in the night sky...
2006-09-03 08:59:56 · answer #4 · answered by nikkoj1975 4 · 1⤊ 0⤋
Because when the galaxy was formed, all of the little particles floating around came together, and formed a sphere shape.
2006-09-03 08:57:35 · answer #5 · answered by Caribbean Blue 4 · 0⤊ 1⤋
Constraints
2006-09-03 09:02:40 · answer #6 · answered by Ishan26 7 · 0⤊ 1⤋
Because when they spin they always form a circle. Remember when you were a kid playing "whirl" and you always formed a circle no matter whcih way you were spun?
2006-09-03 08:58:10 · answer #7 · answered by Anonymous · 1⤊ 0⤋
atoms are round gravity pulls from the center outward and so you have round shapes.
2006-09-03 08:57:29 · answer #8 · answered by Biker 6 · 1⤊ 0⤋
hi hani just know i search and got one good and use ful article
i was amazed by reading that article,u just go through the article u will get the answer you are searching for
Check out the link below
http://www.madsci.org/posts/archives/mar97/857410302.As.r.html
2006-09-03 09:12:26 · answer #9 · answered by karthik s 2 · 0⤊ 0⤋
if its (straight) we will full down...
if its (square,triangle or any shape wit angle) the angles areas will be very dangerous areas to travel......
if its (helical) not feasible shape to live in....
2006-09-03 09:06:03 · answer #10 · answered by ink 2 · 0⤊ 0⤋