Spiral galaxies tend to have older stars towards the core and younger stars in the outer arms
It would be spiral, hence the name it was given.
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.
A large grouping of stars in space is commonly referred to as the galaxy. This can also be called the solar system since planets are also types of stars.
No, The name of our galaxy is the milky way Galaxy. The are many other galxies like the milky way, because it is a sprial galaxy, and there are billions upon billions of of spriral galxaxies.
A galaxy is by a definition a group of stars. If there were no stars it could not be a galaxy.
Pedro's Galaxy
Every galaxy contains stars, if that's what you mean. "Galaxy" means "big bunch of stars". No stars ===> no galaxy.
Elliptical Galaxy The Elliptical Galaxy has mostly old stars and blue stars are new stars.
If it didn't have stars it wouldn't be a galaxy
The answer is Galaxy. a circular collection of stars is a galaxy
There are about 200 -> 400 billion stars in our Galaxy
Yes, stars can exist outside of a Galaxy, but the majority are within a galaxy.