why earth & all the other planets, which emerged out of sun, are in a spherical shape?

Answer 1

Well, let's note that the planets didn't emerge 'from the sun'. Rather, all were formed at roughly the same time from a rotating disk of gas and dust. The sun formed in the middle, accumulating the most mass, and the planets formed around it.

Planets (and stars for that matter) are spheres because it is the perfect gravitational shape for something that has high mass. In this shape, gravity pulls on the surface of the planet equally at every point. This isn't the only reason, but it is the primary one. Note that planets/suns aren't perfect spheres, there are high/low patches.

I hope that helps.

Answer 2

The sun and planets condensed from the pre-solar nebula more or less together. The planets did not emerge from an already formed sun.

Addressing your question, once an astronomical object exceeds a certain mass, gravity becomes stronger than the material making up the object. So the object assumes the shape that gives the lowest potential energy which is a sphere. The spherical shape is modified by the rotational velocity of the object, so a slowly rotating object is closely spherical (e.g., Venus), a middling rotating object is slightly flattened through the poles (e.g., Earth), and a quickly rotating object is substantially flattened through the poles (e.g., Jupiter.)

Answer 3

The rocky materials of the planets were what initiated the formation of the sun.
The sun formed from a hydrogen field after the ejected matter of a super nova crashed into it.
The result was a giant smoke ring that spread out and formed the solar system,the majority of the solar system is the hydrogen that makes up the sun.

Answer 4

Each major object in the solar system formed from within a relatively dense region of a vast cloud of gas and dust (..called a 'nebula'..) Think of four or five molecules in that cloud that come together. Instantly the combined clump has more gravity than individual surrounding molecules. Therefore those individual molecules are attracted to and join with the original clump, thereby increasing its gravity even more. That in turn draws in more bits and pieces of the surrounding cloud from all directions. You can see how the natural shape of the growing clump will be spherical.

Answer 5

When they formed, they were all liquid/gas (the gas giants still are; Earth was back then beasue it was so hot), so surface tension was a factor. It tries to reduce surface area, and a sphere has the lowest one.

The planets did not really come from the sun, but they were formed form the same stuff that it was.

Answer 6

No... The Earth's shape is that of a oblate spheroid (Dyson sphere) or around... If the Earth is Flat... Can U fly a plane from l. a. to l. a. each and every of how at present without turing back, top turn or left turn.... the respond isn't any.... And it definetly will persisted flying out of the earth...

Answer 7

No one is positive they emerged from the sun. They could be nearby bodies that started out to be suns but didn't have enough core gravity to attract enough hydrogen nor generate fusion.

They could also be bodies from deep space captured by the sun's gravity.

Answer 8

Think about a lump of dough, if you keep twirling it around and around...gravity makes it take a spherical shape

Answer 9

Because they were formed by gravity and a sphere has the minimum possible surface area for a given volume.

Doug

Answer 10

its the most balanced shape and nature seeks balance