Star whose brightness changes irregularly or regularly

• RR Lyrae Variables

• Variable Star

• Black Hole

A collection of stars and gas

• Variable Star

• Galaxy

• RR Lyrae Variable

A circle of light shown around or above

• Halo

• Galaxy

• Bulge

Tags

NGSS.HS-PS4-3

A stars brightness varies periodically because it expands and contracts

• Cepheid Variable

• Super Cluster

• Variable Star

A star containing low abundance of heavy elements usually found in the halo

• Variable Star

• Population II Star

• Population I Star

Spiral regions of alternating density which rotates

• Spiral Density Wave

• Galaxy

• Radiation

Energy that is transmitted in the forms of rays

• Radiation

• Cosmology

• Big Bang Theory

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS4-3

A star containing Heavy elements usually young found in the disk

• Variable Star

• Population II Star

• Population I Star

Tags

NGSS.HS-ESS1-3

Nature of the Universe

• Big Bang Theory

• Cosmology

• Cosmetology

Tags

NGSS.HS-ESS1-2

Electromagnetic Radiation leftover from the Big Bang

• Galaxy

• Radiation

• Cosmic Background Radiation

Tags

NGSS.HS-ESS1-2