Yes, there are lots of them.
it is a another galaxy
Another word for galaxy is "star system" or "stellar system."
No - because I am in this galaxy.
Every galaxy interacts, via gravity, with every other galaxy.
A satellite galaxy is one that revolves around another galaxy.
Here are some galaxies (all of them part of the Local Group): The Milky Way, our own galaxy The Andromeda Galaxy, another large galaxy The Triangulum Galaxy, another large galaxy The Large Magellanic Cloud, a dwarf galaxy close to the Milky Way The Small Magellanic Cloud, another dwarf galaxy close to the Milky Way
Observing another spiral galaxy, gives us a good idea about the structure of our own Galaxy.
Because there way bigger than the star
No. Everything in out solar system is in our galaxy, the Milky Way.
The galaxy
Galaxy
a) Earth is not a star, but a planet. b) Earth is not part of "another galaxy", but of our own galaxy.