What are the chances of astronomers of finding a twin earth that the same size?

Answer 1

I would say about 1 in a quad-zillion--- give or take 1 or 2.

Answer 2

You mean somewhere else? Or do you mean the old theory that there might be another planet the same mass as our Earth on exactly the opposite side of our orbit, therefore always hidden by the sun?

The opposite planet theory doesn't hold water. We'd see the slight movements of other planets in our solar system as the other Earth moves near to them.

As to Earth-sized planets in other places, we've been finding Jupiter-sized planets around the galaxy based on that same slight gravitational wobble for more than a decade now (we can't actually see the planets themselves at that distance). As resolution and the method gets better, the size of what we can detect has been getting smaller, and as I hear it, we're almost down to Earth-sized already. If an Earth-sized planet hasn't been found yet, it'll happen within a couple of years.

Answer 3

As a Ph.D in astonomy and geophysics, I can safely assure you the probability is very, very high, giving, of course, astronomers the technology and time to do such a wide search. The exact numbers cannot be calculated simply because no time constraints are given, but I'd say within 100 years another planet, in another Solar System most likely (taking into account the recent Pluto fiasco), a planet very similar to earth will be found, though whether or not it will have life is very much debatable. Hope this helps!

Answer 4

Nearly 100%. To put it into perspective, there are trillions of galaxies, within each galaxy are over 100 billion stars... each star has its own solar system which may contain many planets. Some simple calculations would reveal some pretty high odds of a similar planet. Within our own solar system we have this... Venus is very similar to Earth. Unfortunately due to its atmosphere, it cannot sustain life. They are made up similarly geologically and size-wise. The bigger question is... can any of these Earth-like planets sustain life?

Answer 5

The chances are pretty big. Considering the size of the Universe itself and the number of stars in it.
Do you know that if you want to come just close to the number of stars in the cosmos, you have to count all the sand grains in all the beaches on Earth?
And still you won`t be close ;-)

Answer 6

1 in 67

Answer 7

if its roughly the same size, that would mean that its orbit would be about the same too, around a sun similiar to ours, which isnt too far fetched since there are millions of stars out there. I guess the chances of actually finding one are much slimmer than the chances of there being one.

Answer 8

very good chance. we have studied the smallest amout possible and there are still billions of unexplored stars in our own galaxy alone.

Answer 9

zero in our lifetime, and by the time we are advanced enough to go that far into space we will have either destroyed ourselves or the earth itself.