Space Scales

What is the approximate diameter of the Milky Way galaxy?

• 1,000 light-years

• 10,000 light-years

• 100,000 light-years

• 1,000,000 light-years

What is an Astronomical Unit (AU) primarily used to measure?

• The distance between stars

• The distance between galaxies

• The distance between the Earth and the Sun

• The diameter of the Milky Way

What is the approximate size of a stellar-mass black hole?

• 10 kilometers

• 100 kilometers

• 1,000 kilometers

• 10,000 kilometers

How many Astronomical Units (AU) is the average distance from the Earth to the Sun?

• 0.1 AU

• 1 AU

• 10 AU

• 100 AU

Which star is the largest in terms of diameter?

• The Sun

• Betelgeuse

• Sirius

• Proxima Centauri

What is the approximate diameter of the Solar System, including the Oort Cloud?

• 1 AU

• 100 AU

• 1,000 AU

• 100,000 AU

What is the typical size range of a nebula?

• 1-10 light-years

• 10-100 light-years

• 100-1,000 light-years

• 1,000-10,000 light-years

Which of the following is the smallest type of star?

• Red giant

• White dwarf

• Neutron star

• Blue supergiant

How many light-years across is the Andromeda Galaxy, the closest spiral galaxy to the Milky Way?

• 10,000 light-years

• 100,000 light-years

• 220,000 light-years

• 1,000,000 light-years

What is the approximate diameter of a supermassive black hole at the center of a galaxy?

• 10 kilometers

• 1,000 kilometers

• 1 million kilometers

• 1 billion kilometers