Wouldn't two planets orbiting a sun cancel each other's pull on the sun?

Question

Detection on other planets has been done because of the effect they have on the sun they orbit,but if you have two planets that excert the same pull on the sun and cancelled each other out,than the detection would go unnotice,and we would miss a potential solar system

Answer 1

yes. but there are very rare examples like this. for this, the following is needed in that solar system.
1. the orbit of planets would have completely round
2.the sun will have stable.
3.the planets would have same mass, density and volume.
4.the planets would have at completely opposite side.
5. there should be planets in the table of 2-4-6-8..... and each pair of planets have to be opposite

and if you see the formation of solar system, there are no any theories or material which tells that planets should measuring same have the opposite direction.
so, there are very very very very less cases like this and no one has been found from visible telescopes like hubble

Answer 2

Yes. If they are of similar mass, are on opposite sides of the sun and orbit at the same distance, their effects on the sun would cancel each other out. This would make them undetectable by current means. It is highly unlikely, if not impossible, for two planets to form in the same orbit and on opposite sides of the sun though.

We can't find all the planets around stars. The planets that we can find are limited to stars that are relatively close and/or planets that are very large. It is also easier to find them if they are close to their star.

Answer 3

True, but the odds are that no two planets are going to be exactly the same mass and orbit exactly the same distance from their Sun on exactly the same orbit 180 degrees to each other. In this case, teir are other means of finding the planets as they pass between their sun and us.

Answer 4

There are two effects that are looked for. One is a doppler shift in the stars radiation due to rotation about the centre of mass - this would be affected in the unlikely event that two planets had precisely matched opposite orbits.

The other is the affect on the stars output from transition of the planet. This would not.

Answer 5

I believe two planets, properly situated, may cancel each other gravitational effects. That said, I believe the probability of such event is remote, as the mathematics involved are quite elaborate. We can act as if such event does not happen. The number of planetary systems we will miss because inaccuracy of our instruments is far greater than the number of systems we will miss because the planets cancel the gravitational effects.

Answer 6

Unless planets are of exactly the same mass, they can not have identical orbits, but at opposite sides of their Star. They will eventually collide, just like it is suspected happened with our Earth and Moon, to create our system.

Answer 7

Uhhh, actually the planets have been discovered because of the effect they have on the orbit of other planets, not on the effect they have on the sub.

Pluto was discovered this way, but the gravational effects Pluto on the Sun itself are virtually nil.