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Population I stars (metal-rich stars) are common in the Milky Way's spiral arms; Population II stars are more common in the galactic halo.For more details, you may want to read the Wikipedia article on "Metallicity". Note that in astronomy, "metal" is an informal name for elements other than hydrogen and helium. This usage is quite different from the usage in chemistry.
Yes, stars can exist outside of a Galaxy, but the majority are within a galaxy.
Population I (High metal content) stars are generally found in the arms of spiral galaxies, whereas population II (Medium metal content) are generally found towards the centre of the galaxies.
Spiral galaxy- young stars bluish Elliptical-old stars are red
Older stars are generally towards the centre of a galaxy as they will be the first to accumulate around the galactic centre. Because they are older, there is less "free" hydrogen, so new star formation will occur wherever, there is enough matter to form a new star. This generally is around the outer edges of a galaxy.
The oldest stars in a galaxy are usually located towards the centre. Also known as the bulge.
Population 1 stars are typically young and metal-poor, found in the halo of a galaxy and formed from pristine gas. Population 2 stars are older and metal-rich, located in the disk of a galaxy and formed from gas enriched by supernova explosions of earlier stars.
a galaxy is a huge city of stars and the solar system is located in the milky way galaxy that's our galaxy!
they are located in the middle of the galaxy
A Spiral Galaxy
All over the place.
out side technically it is not inside
Nebula
A galaxy.
A galaxy is by a definition a group of stars. If there were no stars it could not be a galaxy.
I think most of them are in the Milky Way galaxy, that's where our solar system is located.
Every galaxy contains stars, if that's what you mean. "Galaxy" means "big bunch of stars". No stars ===> no galaxy.