MS-ESS1-2 Key Terms

All of space and everything in it including stars, planets, galaxies, etc.

• Universe

• Galaxy

• Planetary System

• Milky Way

A collection of stars, dust, and gas held together by gravity.

• Universe

• Galaxy

• Planetary System

• Astronomical Unit (AU)

Tags

NGSS.MS-ESS1-2

A large spiral galaxy that is home to Earth and the rest of our solar system, and about a trillion stars. .

• Milky Way

• Galaxy

• Planetary System

• Astronomical Unit (AU)

Tags

NGSS.MS-ESS1-2

A star with planets and other celestial bodies orbiting around it, held together by gravity.

• Light year

• Galaxy

• Planetary System

• Astronomical Unit (AU)

Tags

NGSS.MS-ESS1-2

Our sun, planets, and all the other objects that revolve around the sun.

• Light year

• Galaxy

• Solar System

• Astronomical Unit (AU)

Tags

NGSS.MS-ESS1-2

NGSS.MS-ESS1-1

NGSS.MS-ESS1-3

The average distance between Earth and the sun

• Light year

• Galaxy

• Distance

• Astronomical Unit (AU)

The distance light travels in one year

• Light year

• Celestial body

• Distance

• Astronomical Unit (AU)

A natural object in space such as a star , moon, planet, asteroid, planetoid, comet.

• Planet

• Celestial body

• Star

• Astronomical Unit (AU)

Tags

NGSS.MS-ESS1-3

An exploding ball of burning gas held together by gravity, creates its own heat and light.

• Planet

• Celestial body

• Star

• Planetoid

An object that orbits a star, is large enough to have become rounded by its own gravity, and has cleared the area of its orbit.

• Planet

• Celestial body

• Star

• Planetoid