Could there be other planet(s) in our system that?

Question

are hidden from us because they are on the other side of the sun, their year matching our year almost perfectly?

Answer 1

I've actually played with a computer program simulating gravitation between planets, and tried to replicate the scenario you describe. It did not work, because the orbits could not be made exactly stable. What happened was that eventually, one of the planets caught up with the other one.

The only way it could be possible is that an advanced alien race put a planet there and kept it in place artificially. But, if they had done so, we would have discovered it by now.

Answer 2

I read a book a long time ago where just this thing happened, space explorers thought they were returning to Earth and instead returned to an Earth that was on the exact opposite rotation of our Earth so we could never see it.  I forget the name of the book but I remembered it as soon as I saw the question....

anyhow, with all the space probes we have flying around now we probably would have seen it if it really existed.

Answer 3

No it really is impossible. Every planet in the solar system has an effect on A its neighbours and B the sun. We know this by tracing their orbits, observing their movements, we know exactly what each planet is up to and what it is going to get up to. Theres no doubt, there are no more planets "hidden" behind the sun. Its possible that there could be a planet orbiting FAR beyond Pluto, however again, we should see its effects. Besides, those probes arn't really looking for another world are they?

Answer 4

anything is possible in the universe...

but in reality, no....we'd of detected them by now.... (like i said anyting's possible, but the chances are about similar to a meteor falling out of orbit and landing dead square up your *** as you bend over to pick up a dollar.....  as close to non-existent as you can possibly get.)

Answer 5

That would be quite a find!

Answer 6

Nope.

Our space craft would have either seen them or been pulled by their gravity.  

Also, the planets gravity would interact with the other planets and asteroid belts, and there is absolutely no evidence for that.  

Answer 7

I'd say absolutely 100% impossible. The various probes we have sent around our solar system would have noticed something like a planet. Gravitational wobble etc. 100% no way.

Answer 8

For it to have been in the exact same spot fin relation to Earth for thousands of years (the period of time humans have been looking up and righting stuff down) it would need to be the exact same distance from the Sun as Earth no matter its mass. We know no other planet has anything substantial in its orbital path so there is no reason to believe the Earth would have something perfectly half an orbit away. If its orbit were even a few miles more or less distant than the Earth than us or it would have caught up with the other billions of years ago and collided or flung the other off into some eccentric orbit. And besides, one of the criteria for being a planet is clearing its orbit of other massive bodies. So if there were another body in Earth's way than neither Earth nor the other world be considered a planet.

Earth having an evil twin as it were exactly the same distance from the sun exactly 6 months away at all times would be like flipping a coin a billion time and always getting heads or tails, but then instead head or tails one time you get a turkey... it doesn't make sense. And if it were possible for two worlds to form in the exact same orbit than our understanding of astrophysics is as good as a two year olds understanding of the birds and the bees or there is a giant spaghetti monster flying around space creating ****ed up solar systems left and right because hes bored.

But your probably right about our probes not seeing anything. Though something probably would have been picked up in images of other planets like an unfamiliar star in the background of a picture of Titan or some such other celestial body visited by one of our probes that would have gotten scientist thinking there is probably no definite proof that there isn't some physics defying planet there.