Astronomers measure it by predicting with the stars and using scientific tools
Earth has an ozone layer in atmosphere. It is present in the stratospheric region. Other planets which have oxygen in their environment might have ozone.Some planets like earth do. Others might have.
Planets don't have planets. The Sun has planets, and planets have moons.Dwarf planets might orbit around each other, but this answer uses the correct definition of the term planet, which does not include Pluto or Charon.
there isn't actually a reason for "what are planets for" but they might be for life forms. planets are not for anything really, they just got made by gravity.
Because the inner planets are closer to the sun than the outer planets.
no there is not, if so there might be from the outer planets like saturn uranus or neptune definetely
None of them do. All the outer planets are gas planets while all the inner planets are rocky. You might be thinking of Pluto. It has a solid surface, but it is no longer considered a planet.
Nobody knows for sure, but there is so many, that there might be more planets than people on earth!
The opposite of the verb measure might be not to measure, or to guess.
Stony and Gas Giant. But it still divides the same.
i think there might be quadrillions of planets with life on
there might well be life but there is no live
yu might want to rephrase this question it dont make no sense