Sun, Stars, and Galaxies

What is the Sun primarily made of?

• Oxygen and nitrogen

• Carbon and helium

• Hydrogen and helium

• Hydrogen and oxygen

What type of star is the Sun?

• A red giant

• A medium-sized star

• A white dwarf

• A supernova

Which part of the electromagnetic spectrum does the Sun radiate most of its energy in?

• X-ray, gamma, and infrared

• Infrared, visible, and ultraviolet

• Microwave, radio, and X-ray

• Ultraviolet, gamma, and microwave

What process powers the Sun and other stars?

• Nuclear fission

• Nuclear fusion

• Radioactive decay

• Chemical combustion

In stable stars, nuclear fusion mainly converts:

• Hydrogen into helium

• Helium into carbon

• Oxygen into nitrogen

• Carbon into iron

What is a galaxy?

• A collection of planets and asteroids

• A cluster of gas and dust

• A group of billions of stars

• A single star system

The Sun is part of which galaxy?

• Andromeda

• Milky Way

• Triangulum

• Whirlpool

Compared to the Sun, the other stars in the Milky Way are:

• Closer to Earth

• Further away from Earth

• At the same distance from Earth

• Moving toward the Sun

What is the approximate diameter of the Milky Way galaxy?

• 10,000 light-years

• 50,000 light-years

• 100,000 light-years

• 1,000,000 light-years

What is the unit used to measure astronomical distances?

• Kilometers

• Miles

• Light-years

• Astronomical units