Astronomy Practice Test — Medium Level

1. What is the primary component of a star's mass?

• A.Hydrogen
• B.Helium
• C.Carbon
• D.Oxygen

2. Which type of galaxy is characterized by a flattened disk and spiral arms?

• A.Elliptical
• B.Spiral
• C.Irregular
• D.Lenticular

3. What is the approximate age of the universe?

• A.1.3 billion years
• B.4.5 billion years
• C.13.8 billion years
• D.25 billion years

4. Which planet in our solar system has the most moons?

• A.Earth
• B.Mars
• C.Jupiter
• D.Saturn

5. What phenomenon occurs when a star runs out of fuel and collapses under its own gravity?

• A.Supernova
• B.Black hole
• C.Neutron star
• D.White dwarf

6. Which of the following is not a terrestrial planet?

• A.Mercury
• B.Venus
• C.Earth
• D.Jupiter

7. What type of light is emitted by hot stars?

• A.Infrared
• B.Ultraviolet
• C.Microwave
• D.Radio

8. Which celestial object is known as the 'Red Planet'?

• A.Mars
• B.Venus
• C.Jupiter
• D.Saturn

9. What is the center of the solar system?

• A.Earth
• B.Sun
• C.Moon
• D.Jupiter

10. Which of the following is the largest type of star?

• A.Red giant
• B.White dwarf
• C.Neutron star
• D.Main sequence star

11. What is the name of the force that governs the motion of celestial bodies?

12. Name the galaxy that is closest to the Milky Way.

13. What is the term for a planet that orbits a star outside our solar system?

14. What is the primary source of energy for stars?

15. In what part of the electromagnetic spectrum do most stars emit their peak radiation?

16. What is the main component of the Milky Way galaxy?

• A.Dark matter
• B.Stellar matter
• C.Interstellar gas
• D.Dust

17. Which planet has the largest volcano in the solar system?

• A.Earth
• B.Mars
• C.Venus
• D.Mercury

18. What type of star is our Sun classified as?

• A.Red giant
• B.White dwarf
• C.Main sequence
• D.Neutron star