Meteors that reach the Earth's surface are called ____. |
asteroids |
Stars arise in freezing clouds of dust and gas known as ____. |
comets |
Millions of ____ (huge rocks) orbit between Mars and Jupiter. |
constellations |
Most ____ originate in the Kuiper belt or the Oort cloud. |
meteorites |
When asteroids smash together, ____ (small rocks) break off. |
meteoroids |
Mizar and Alcor are double ____ in the Big Dipper asterism. |
meteors |
The celestial sphere is divided into 88 ____. |
nebulae |
Meteoroids that enter the Earth's atmosphere are called ____. |
stars |