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Very likely, their are thousands maybe even millions of planets in the galaxy that are habitable, than their are trillions of galaxies.
Other than Earth, no planets have been confirmed to be habitable. We do know of planets in other star systems upon which liquid water could theoretically exist but we can't measure the composition of the planets atmospheres therefore we can't know for certain whether or not they are habitable.
Planets orbit stars, stars orbit a galaxy. Planets are not "on" anything. A lot of stars out there have planets - we are just finding out how many now that we have better techniques to find them. So probably all galaxies have at least some stars with planets.
As a matter of fact, yes. It has planets just like the Milky way galaxy.
Since a galaxy can have many solar systems and a solar system might have more than one planet, for each galaxy there would be many planets. Therefore there would be more planets than galaxies.
The Kepler mission is specifically designed to survey a portion of our region of the Milky Way galaxy to discover dozens of Earth-size planets in or near the habitable zone and determine how many of the billions of stars in our galaxy have such planets. Results from the mission will allow us to place our solar system within the continuum of planetary systems in the Galaxy.
Very likely, their are thousands maybe even millions of planets in the galaxy that are habitable, than their are trillions of galaxies.
So far we know of only one planet that is habitable.
There are billions of planets and moons in the Star Wars galaxy.
Other than Earth, no planets have been confirmed to be habitable. We do know of planets in other star systems upon which liquid water could theoretically exist but we can't measure the composition of the planets atmospheres therefore we can't know for certain whether or not they are habitable.
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In this galaxy, only Earth for humans. Mars may once have had life, but it is not habitable to humans. Astronomers and scientists have found planets somewhat similar to Earth, but they may not have all the conditions necessary for humans. We still know very little about these planets.
The planets are part of the galaxy.
The only planet from our solar system that has been mentioned in the Stargate series is Earth. Other planets do not have stargates, since from the beginning the planets are not habitable.
It is not generally known how many planets are in each galaxy; it isn't even known how many planets are in our own galaxy, and will probably never be known exactly, due to its enormous size. However, according to latest observations, it seems likely that every star has several planets, at least on average.
There are trillion trillion planets in our galaxy
As of (2011) no planets have been observed that are habitable. Some MIGHT be, but until detailed research is done on the actual conditions, it cannot be said a planet is habitable.