One, that we're sure of; Earth. There's a very slight chance that some life might exist elsewhere, but at this point, it doesn't seem likely.
There is a vague chance that life might exist on one or more of Jupiter's or Saturn's moons.
I would think exobiology is the study of living things on other planets, though we still have not found living things on other planets.
maybe yes or maybe not as we are not the ones who study about the planets
depending on the planet there cannot be living things on other planets
There are no planets of our knowledge that contain living creatures.
An ecosystem
Earth, Apart from ours no other planets been proved to have living things !
Every planet in our solar system has a direct line of sight to the Sun, but Earth is the only one where there are living things to look up at it.
So far yes, but scientists are still searching for other life forms on planets such as Mars.
It is highly unlikely that any other planet in our solar system will. That does not preclude the possibility of life being elsewhere in the universe.
No. The metric system (and the Imperial system and any other system like them) is a system of measurement. In so far as all living things occupy a volume, have a mass and experience time, the system measures characteristics that living things experience but these are not, in themselves, characteristics of the living things.
Planets cannot like things, they are not living.
Yes there are living things on other planets. think of how many planets there are in this universe. It would be something like 1/100000000000000000000 chance of Earth being the only planet with life.