Concentration of 106 to 1012 stars, dust and gas, that are gravitationally bound. Our galaxy contains ~2 × 1011 stars.
There are four main types of galaxies:
- Elliptical
- Lenticular
- Spiral
- Irregular
Concentration of 106 to 1012 stars, dust and gas, that are gravitationally bound. Our galaxy contains ~2 × 1011 stars.
There are four main types of galaxies: