Astrophysics 5

Astronomers believe there are __________ of galaxies in the universe.

• hundreds

• billions

Do we have a satellite that orbits the sun?

• Yes

• No

What is the name of the spacecraft that is currently furthest from Earth?

• Voyager 1

• Hubble telescope

Voyager 1 is a space probe. What does a space probe do?

• It transports astronauts.

• It explores space.

What is the shape of our galaxy, the Milky Way?

• Elliptical

• Irregular

• Spiral

Can we see the Milky Way from Earth?

• Yes

• No

Put the following in order from biggest to smallest.

• Galaxy, star, universe, planetary system, planet.

• Universe, galaxy, planetary system, star, planet.

Both comets and asteroids orbit the sun.

• True

• False

Which planet is closest to the sun?

• Mercury

• Venus

Which planet is hottest?

• Mercury

• Venus