Ch. 19 & 20 Vocab

Front

Path an object follows around another object.

Back

orbit

Front

Small, rocky object orbiting the sun in the asteroid belt between Mars and Jupiter.

Back

Asteroid

Front

Object of gas, dust, and ice moving around the sun in an oval orbit.

Back

comet

Front

Planet's atmosphere traps solar energy, increasing surface temperature.

Back

greenhouse effect

Front

Object in space made of gases where nuclear fusion emits energy.

Back

star

Front

Streak of light in Earth's atmosphere from a glowing meteor.

Back

meteor

Front

Meteoroid that strikes a planet or moon.

Back

meteorite

Front

Small, rocky particle moving through space.

Back

meteoroid

Front

True brightness of an object.

Back

luminosity

Front

Graph plotting luminosity vs temperature of stars.

Back

Hertzsprung-Russell diagram