Which is true about the Sun?

• It is a medium sized star nearby us.
• It is in the center of the galaxy.
• It is a very large star.
• It has galaxies orbiting around it.

What controls the movement of comets, asteroids, and planets within our solar system?

• Their composition (what they're made of)
• Gravitational attraction
• Magnetic forces between them
• How the Big Bang created the universe

From which star does the Earth receive the most energy?

• The brightest star
• The biggest star
• The closest star
• The newest star

Why can't we see the entire Milky Way?

• It is big.
• We are in the Milky Way.
• The stars are small.
• There is a black hole.

Which section has the coolest, brightest stars?

• A
• B
• C
• D

How does a white dwarf compare with a blue star?

• White dwarfs are cooler
• White dwarfs are dimmer

Which is biggest?

• Galaxy
• Universe
• Moon
• Planet

Which has more mass?

• Galaxy
• Star
• Moon
• Planet

A collection of dust and gases that form stars or results from "dying" stars.

• nebula
• star
• planet
• universe

A sphere of gas that has nuclear reactions occurring within.

• solar system
• planet
• star
• moon