What is an interstellar cloud of gas and/or dust?

• Sun

• Asteroid

• Natural satellite (moon)

• Comet

• Nebula

A great island of stars in space, all held together by gravity and orbiting a common center

• Nebula

• Planet

• Universe

• Galaxy

What is a star and all the material which orbits it, including its planets and their moons?

• Solar (star) system

• universe

• Natural satellite (moon)

• Comet

• galaxy

The total of all matter, energy, and time - everything within and between all the galaxies

• universe

• natural satellite (moon)

• galaxy

• solar (star) system

What is a moderately large object which orbits a star; it shines by reflected light.

• Star

• Planet

• Natural satellite (moon)

• Galaxy

• Nebula

What is a relatively small and icy object which orbits a star?

• Sun

• Asteroid

• Natural satellite (moon)

• Comet

• Nebula

What is a large, glowing ball of gas that generates heat and light through nuclear fusion?

• Star

• Planet

• Natural satellite (moon)

• Galaxy

• Nebula

What is A relatively small and rocky object which orbits a star?

• Sun

• Asteroid

• Natural satellite (moon)

• Comet

• Nebula

What is an object which orbits a planet?

• Star

• Planet

• Natural satellite (moon)

• Galaxy

• Nebula

What are the inner and outer planets separated by?

• natural satellites (moons)

• Rings

• Asteroid belt

• gas giants