E/S Ch. 18 Vocab

Ball of gases that gives off light and heat.

• nebula

• star

Cloud of gas and dust in space.

• Nebula

• Protostar

Two stars that revolve around each other.

• Binary Stars

• Protostar

Dense material in the center of a nebula that is about to become a star.

• Binary stars

• Protostar

Large group of stars that travel together through space.

• Star

• Star Cluster

Pattern of different colors of light coming from an object.

• Spectrograph

• Spectrum

Device that measures the spectrum of an object.

• Spectroscopy

• Spectrograph

Study of light coming from objects in space.

• Spectroscopy

• Spectrum

Way to measure a star's brightness.

• Main sequence star

• Magnitude

Star that falls within a long, narrow, diagnol band across the H-R diagram

• Red Giant

• Main sequence star