yes
The sun is one of an estimated 400 billion stars in our galaxy.
Large stars are distributed all over our galaxy, there is no single location for them.
It has been estimated that there are between 200 -> 400 billion stars in the Milky Way Galaxy
Yes, stars can exist outside of a galaxy. These stars are typically referred to as intergalactic stars, and they may have been ejected from their original galaxy due to interactions with other stars or galactic dynamics. Intergalactic stars are typically found in the space between galaxies.
between 200 and 400 billion stars
The dust and gas located between stars in a galaxy is called the interstellar medium (ISM). This material plays a crucial role in the formation of new stars and planets within the galaxy.
That means matter between stars - mainly dust and gas.
A typical galaxy may have anywhere between a few million (106) stars, and over a trillion (1012) stars. Our own Milky Way is estimated to have between 200 and 400 billion (2x1011-4x1011) stars.
A galaxy is by a definition a group of stars. If there were no stars it could not be a galaxy.
A dwarf galaxy might contain this number of stars. A galaxy will contain billions of stars.
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.