Characteristics of a Galaxy A Galaxy is a large group of stars, gas, and dust held tighter by gravity.

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Presentation transcript:

Characteristics of a Galaxy A Galaxy is a large group of stars, gas, and dust held tighter by gravity.

Types of Galaxies Spiral Galaxy *Have spiral areas that wind outward from inner regions. *The arms are made up of stars and dust. *Milky Way (our universe is a spiral). *Brightest stars. *Most common galaxy.

Types of Galaxies Elliptical Galaxy *Shaped like large three –dimensional ellipses. *Oldest stars.

Types of Galaxies Irregular Galaxy *Have many shapes *Smaller than other types of galaxies. *Newest stars.

Universe from Largest to Smallest UniverseGalaxy Solar System Planet