SOLAR SYSTEM

Detailed explanation-1: -A planet is round because of gravity. A planet’s gravity pulls equally from all sides. Gravity pulls from the center to the edges like the spokes of a bicycle wheel. This makes the overall shape of a planet a sphere, which is a three-dimensional circle.

Detailed explanation-2: -Believe it or not, it actually is just a coincidence-and a happy one at that. The Moon and Sun have virtually the same angular size in our sky because the Sun is about 400 times wider than the Moon, but it’s also about 400 times farther away.

Detailed explanation-3: -Stars, planets, and moons are all spherical. Why? It all comes down to gravity. All the atoms in an object pull towards a common center of gravity, and they’re resisted outwards by whatever force is holding them apart.

Detailed explanation-4: -The sun is the most perfectly round natural object known in the universe, say scientists who have conducted precise measurements of its dimensions. As a spinning ball of gas, astronomers had always expected our nearest star to bulge slightly at its equator, making it very slightly flying-saucer shaped.

Detailed explanation-5: -The short answer But to answer it simply, the reason big astronomical objects are spherical (or nearly spherical) is because they’re massive enough that their gravitational pull can overcome the strength of the material they’re made from.