Astronomy Revision Quiz

Ganymede is an object that moves around Jupiter and does not create its own light. Which of the following is the best classification for Ganymede?

• Planet

• Moon

• Star

Select two key distinctions between the Solar System and the Milky Way:

• The Solar System is part of the Milky Way, but the Milky Way is much larger

• The Milky Way contains billions of stars, while the Solar System contains only one star

• The Milky Way is a galaxy, whereas the Solar System is a smaller collection within it

• The Solar System has many stars, unlike the Milky Way

Choose the best answer to complete the sentence: The limit of the observable universe is determined by:

• The farthest reaches of our galaxy, the Milky Way

• The size of the Virgo Supercluster

• The maximum distance any human spacecraft has traveled

• The amount of time it takes light to travel to Earth

Provide two ways in which planets differ from stars.

What does the term “light-year” refer to?

• The length of time it takes for light to reach Earth from the Sun

• The time it takes light to cross from one solar system to another

• The distance a spacecraft could travel in one year

• The distance light travels in one year

The Milky Way spans about 100,000 light-years. Which of these is larger than the Milky Way galaxy?

• Large Magellanic Cloud, 14,000 light-years

• Solar System, 2 light-years

• Fornax Cluster, 20,000,000 light-years

• Andromeda Galaxy, 2,000,000 light-years

If the Andromeda Galaxy is 2.5 million light-years away from Earth, what does this mean?

• There are 2.5 million stars between us and Andromeda

• It would take a spacecraft 2.5 million years to get there

• Light from Andromeda takes 2.5 million years to reach us

Consider two stars: Betelgeuse, located 500 light-years away, and Tabit, 26 light-years away. What conclusion can we make from this information?

• Tabit is 26 times as bright as the Sun

• Light from Tabit will reach Earth before light from Betelgeuse

• Betelgeuse is larger and brighter than Tabit

• Betelgeuse is older than Tabit

Explain why the images we see through telescopes show us events from the past.

What type of matter is found at the Sun’s core?

• Plasma

• Gas

• Photons

• Liquid