temperature, gravity, atmosphere, and water
Earth is only one planet on solar system which has sustainable atmosphere. In other words, Earth got all the factors that can support the life. Edit: Temperature is important too, and liquid water seems to be essential.
Earth is the most habitable planet in the solar system, which is why there is so much life on it. As far as we know, no other planet has life on it. Mars could possibly support human life, with supports to help them.
earth
Pluto IS NOT a planet - by definition.
It is the only planet that supports life. (As far as we know)
At the moment, as far as we know, the only planet suitable to support a diversity of life is our Earth.
Earth is only one planet on solar system which has sustainable atmosphere. In other words, Earth got all the factors that can support the life. Edit: Temperature is important too, and liquid water seems to be essential.
Mercury's orbit which does not fully comply with Kepler's laws supports general relativity.
Earth supports life, because it has oxygen.
Earth is the most habitable planet in the solar system, which is why there is so much life on it. As far as we know, no other planet has life on it. Mars could possibly support human life, with supports to help them.
Earth
Earth
earth
Earth is the most habitable planet in the solar system, which is why there is so much life on it. As far as we know, no other planet has life on it. Mars could possibly support human life, with supports to help them.
The planet that supports life, and has an ozone layer. Unless there's another world with life, instantly it's Earth.
Pluto IS NOT a planet - by definition.
I don't think so. It is most probably the only planet to support life forms very similar to ours, but that does not imply that some other planet(s) don't have life forms of some other nature than ours.