Astronomy Quiz

What major astronomical tool allowed scientists to discover more bodies in our solar system?

• The microscope

• The telescope

• The spectrometer

• The radar

How long does light from the sun take to reach Earth?

• 8.3 minutes

• 10 minutes

• 5 minutes

• 15 minutes

What is the distance from the sun to Pluto in astronomical units (AU)?

• 40 AU

• 15 AU

• 90 AU

• 50 AU

Which of the following is NOT considered a gas giant?

• Jupiter

• Saturn

• Neptune

What planet is sometimes farther from the sun than Pluto?

• Neptune

• Jupiter

• Saturn

• Uranus

Compare the differences between the inner solar system and the outer solar system.

• Inner planets are larger and gaseous, outer planets are rocky and smaller.

• Inner planets are smaller and rocky, outer planets are larger and gaseous.

• All planets in both systems are gaseous and large.

• All planets in both systems are rocky and small.

What is the average distance between the Earth and the Sun, known as one astronomical unit (AU)?

• 150 million kilometers

• 100 million kilometers

• 200 million kilometers

• 250 million kilometers

Name the four planets in the inner solar system.

• Mercury, Venus, Earth, Mars

• Jupiter, Saturn, Uranus, Neptune

• Earth, Mars, Jupiter, Saturn

• Venus, Earth, Neptune, Pluto

How is Pluto different from the other planets in the outer solar system?

• It is smaller and primarily composed of ice and rock.

• It is the largest and has the most moons.

• It is the only planet with rings.

• It is the closest to the Sun.

Why do scientists use light-minutes and light-hours to measure distances within our solar system instead of light-years?

• Because light-minutes and light-hours use smaller numbers to compare the distances within the solar system.

• Because light-minutes and light-hours are easier to calculate than light-years.