there may be one planet- Kepler 22b. it is green and blue and may have land and water and POSSIBLY "creatures" like us.
yes, millions/billions
Also the first planet outside our solar system ,HD 209458b, is told to have water, they found this because of the vapour in it's atmosphere.
In the Solar System the answer is Earth since it is the only planet that has water.
Mars is the other planet in our solar system besides Earth that has water.
earth
Earth
That is the planet Saturn.
water (and therefore, oxygen)
yes
Definitely. Out of every planet in our Solar System, Earth is the only one with liquid water on its surface.
Most planets in the Solar System have been found or speculated to have water. But at the moment only Earth is known to have water in the liquid state. Both polar caps on the planet Mars are known to have frozen water. It is also speculated that under the crust of some moons in the outer solar system, liquid H2O oceans may exist. Outside the solar system no one knows, but just recently astronomers have discover the exo-planet Gliese581g, which seems to be the right temperature that might support the existence of liquid water on its surface.
Our planet, the Earth is the only planet with drinkable water. It is the only planet in our Solar System with life and oxygen. Without the oxygen, there will be no life and water on Earth.