why the orbit of earth and other planets around sun is oval shape?

Question

are all planets in milkyway have oval orbit?
even if that happened at bigbang time at a fraction of a second ,then shouldent the centrfugal force to have corrected it to a circle by now?

Answer 1

Ok here is the best answer in layman terms....

The reason they are oval shaped is because the closer the planet gets to the sun the stronger the gravitational pull is. So when it gets close the the sun, the sun pulls on it even stonger then it did when it was faller away causing the planet to pick up speed and sort of sling shot away.

When the planet gets far again it slows down. This speeding up and slowing down causes a sling shot affect on each side of the orbit creating an oval shape.

Answer 2

When you talk about orbits of planets, that will mean around some star (like the sun). The Milky Way is our galaxy, which consists of hundreds of billions of stars, so there is a huge difference in scale there. Next, at a fraction of a second after the big bang, there were no planets. The universe was hot enought that nothing solid could have formed at that time. It wasn't until millions of years after the big bang that stars could form, let alone planets to orbit those stars. More specifically, the sun and our solar system (including the earth) didn't form until the universe was about 9 billion years old!

As for why orbits are oval:
First, to be a in a circular orbit requires a very specific speed in the orbit. If the actual speed of the planet is a big lerger than this 'circular speed', then the planet will tend to swing a bit farther away from the sun, thereby losing some of its speed. However, it will overshoot the 'correct' distance from the star and end up going slower than the speed for the circular orbit at the greater distance. Because of that, it will tend to fall back towards the star, ending up with the same speed that it started with and at the same distance. This forms an oval. Because there is so little material in space, there is very little friction, so the orbit will stay an oval over very long periods of time. In addition, there are small 'nudges' from the other planets that keep a perfectly circular orbit from forming.

Answer 3

The main reason for planets travelling in an oval orbit is the force of gravity that is exerted on them. This gravity doesn't only come from the sun but from other planets. This causes the planets to be attracted to other planets at certain times but the main gravitational force is from the Sun. Because of these attractions the orbits ar oval.

Answer 4

Because planets are captured material which have their own linear velocity. Because of this velocity, the planet is always trying to move in a straight line (the longer axis in the orbit is the initial direction), but the gravity of the sun keeps it in orbit. Any object in this condition displays an elliptical orbit.

Answer 5

i believe they are elliptical. Kepler proved it mathematically. "shouldent the centrfugal force to have corrected it to a circle by now?" Good question. It could be that the other planets in the solar system cause the orbits to remain elliptical but I don't know for sure.

Answer 6

Masses in space orbit around their common centre of gravity. In the case of the earth and sun, this is much closer to the sun than the earth because the sun weighs considerably more than the earth. Therefore, the orbit of the earth round the sun is elliptical rather than circular. Same applies to other masses in the universe.

Answer 7

Planets' orbits are elliptical. Venus' orbit is close to a perfect circle, not not exactly. The Sun is one of the foci and the other foci is empty. All planets probably do have elliptical orbits because it would not be possible for a planet to orbit its sun in a circle.

Answer 8

Planets were not created in the big bang - that was 13.7 billion years ago, and Earth is only 4.6 billion years old. Planets travel in ellipses, not perfect circles. We can say that about our planets and any others we might find because it's impossible to make a 'perfect' circle, but then many will be 'nearly' circular (eccentricity ~ 0). The centrifugal force only occurs in accelerated reference frames; it has no effect on planetary dynamics. Gravity keeps the planets in their orbits.

Answer 9

not an oval but an ellipse..in reality a planet and it's sun spin around each other but because the sun is heavier etc the planet appears to orbit it's sun...johanne keplar sussed this out with really really basic telescopes and looking at the planets for twenty years..before newton discovered about gravity...they locked keplar up in a looney bin because his third book was about the 'music of the spheres' where vibrations were the essence of the universe...does this sound like string theory...yep it do..mb

Answer 10

I thought the orbit of most planets was circular, but they had just discovered that Jupiter has an oval orbit and therefore is not a planet any more but classed as a lesser planet?