Vocabulary Unit 7 Lessons 1-5

real or imaginary line through the center of an object

• axis

• orbit

• eclipse

• NASA

bits and pieces of leftover dust and rocks

• axis

• orbit

• debris

• NASA

half of the sphere of Earth

• axis

• hemisphere

• debris

• NASA

a blanket of gas surrounding a planet

• hemisphere

• orbit

• eclipse

• atmosphere

the curved path something in space takes around another object in space

• hemisphere

• orbit

• eclipse

• atmosphere

the surface of the land and its features

• axis

• terrain

• debris

• NASA

extremely cold

• NASA

• terrain

• debris

• frigid

an acronym for the National Aeronautics and Space Administration

• NASA

• terrain

• debris

• frigid

to turn about on an axis or a center

• rotate

• orbit

• axis

• frigid

the blocking of the light from the sun by another heavenly body

• rotate

• orbit

• axis

• eclipse