The planets are part of the galaxy.
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.
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.
That is very likely, although for obvious reasons, all planets discovered so far (or most of them?) are in our own galaxy.
No planets have been officially recognised outside our galaxy, though more than 500 exoplanets have been identified outside our solar system. Our nearest galaxy is too far away to detect such planets, though we can assume that it will contain several millions of planets based on observations within our own galaxy.
A galaxy is far larger. A planetary system involves one or more planets revolving around a single star. A Galaxy consists of billions of stars.
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.