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The planets are part of the galaxy.
It is possible that every galaxy has some planets. We just are starting to detect some planets in other galaxies.
The planets we know of, some 300 now, are all in the Milky Way galaxy.
Planets are not necessarily in a galaxy but chances are very slim that in a galaxy that is not just newly forming there would not be any exoplanets.
We expect the Andromeda galaxy to be just like our own Milky Way galaxy. We can see stars (suns) in the Andromeda Galaxy and just as stars have planets orbiting them in our galaxy, we believe that there must be planets also orbiting stars in the Andromeda galaxy.
No. I don't believe any planets have been detected outside of our Galaxy. Within our Galaxy, planets are detected by inference not visual techniques. See link for lists of known extrasolar planets
As a matter of fact, yes. It has planets just like the Milky way galaxy.
There are billions of planets and moons in the Star Wars galaxy.
The galaxy is not a planet. The galaxy is MADE of millions and millions of stars and planets.
It is extremely likely, but we cannot yet find planets from that far away. All the planets we have found to date are in our own galaxy. The Andromeda galaxy is 2.5 million light years away whereas our galaxy is about 100,000 light years across.
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There are no known planets in any galaxy other than our own. While it is doubtless that other galaxies, including the cigar galaxy, contain planets they are much too far away fur us to detect them.