What are galaxies?
2 Answers
Huge collections of star systems.
Explanation:
A "galaxy" is the separate identifiable grouping of many stars. Just as stars and their systems can have many different configurations and sizes, galaxies also differ in size and geometry. They are distinguished from other galaxies by the large gaps of space between them, just as star systems are separated by space within a galaxy.
www.nasa.gov and www.space.com are some good places to look for this kind of information.
A galaxy is a gravitationally-bound astrophysical system.
Explanation:
Galaxies contain all sorts of things, such as stars, gas, dust, dark matter, planets, etc...
Galaxies are typically divided into categories that are based on its shape and structure, such as spiral or elliptical.
Our galaxy is the Milky Way, which is a spiral galaxy. Our solar system's location is actually in one of the spiral arms.
