What is a dwarf galaxy?
Quick Answer
A dwarf galaxy is a small galaxy with far fewer stars than a large spiral or elliptical galaxy. Some dwarf galaxies contain only a few million stars.
The Full Story
Dwarf galaxies are the most common type of galaxy in the universe. They are much smaller than giants like the Milky Way and can contain anywhere from a few million to a few billion stars. Many orbit larger galaxies as satellites, and some are being torn apart by gravitational interactions. Because they are relatively simple systems, astronomers use dwarf galaxies to study dark matter and galaxy formation. Well-known examples include the Large and Small Magellanic Clouds.
Key Facts
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