Will the earth start over

Answer 1

Earth is the only planet called Earth and the only one we know of that is habitable to us. Scientists suspect that planets similar to Earth orbit other stars, but it is very difficult to determine trains of such distant planets.

Answer 2

If science advances enough by that time the human race may be able to colonize a new planet with similar atmosphere (assuming of course there is no other intelligent life form, or if there is they have been wiped out) the human race will be able to rebuild but the planet earth will not start over.

Answer 3

No. There have been recent discoveries of planets orbiting nearby stars, but none which can be said to be another Earth. Even if there was another suitable planet found, it would take at least hundreds of years to get there using present technology.

Answer 4

Yes. However the chances that it will look exactly like human life are slim, but the chances of there being a planet with beings living there of human-level intellect are quite high. This is mainly because the Universe is so very big, and the basic molecules (e.g. amino acids) required for life have been discovered in many galaxies.

Life is probably quite abundant. However it is very difficult to check for life on distant planets; mostly because the planets are very far away and don't radiate much light. Most life searches therefore look for life indirectly by checking if a planet is close enough to a star to have liquid water, but not too close so it will evaporate immediately

They also look for traces of oxygen in the planet's atmosphere. This is because oxygen on its own will deplete quite quickly without a constant supply because oxygen reacts very efficiently with other chemicals. Therefore any planet having much oxygen has to have some kind of mechanism for producing it; like life. 99.9% of the Earth's oxygen is produced by life.

Answer 5

No. There were a number of Science Fiction stories about an "alternate Earth" that was in the Earth's orbit but directly opposite the Earth from the Sun. Such a planet would never be visible from Earth.

Alas for the SF writers, spacecraft that we have launched to Mercury, Venus, Mars, and the outer planets WOULD have been able to detect such a "counter-Earth", and there's nothing there.

Could there be another planet similar to Earth orbiting some other star? Given the number of other stars in the universe, this is entirely possible - but unlikely. But it would be too far away for us to ever detect it at our current level of technology.

Answer 6

Oh yes, it is easily possible, even likely that in the entire universe, there are other planets which resemble the Earth. We may never be able to travel to those planets, because interstellar distances are so extremely large, but nonetheless, they probably do exist.

Answer 7

There might be one orbiting another sun, but it is as of yet undiscovered.

Answer 8

Mars is the closest other planet to support life, and Venus is Earth's sister planet because if size. Venus is truthfully highly un-liveable.

Answer 9

Yes four light years away, it's still in the process of being born.

Answer 10

Astronomers have newly discovered a planet , Gliese 581g, within the "Goldilocks" zone - see related link to the news article .