- 1. Stellar astronomy is the branch of astronomy that focuses on the study of stars, including their formation, evolution, and properties. Stars are giant balls of gas mostly made up of hydrogen and helium that generate energy through nuclear fusion in their cores. By studying the light emitted by stars, astronomers can determine their temperature, size, composition, and distance from Earth. Stellar astronomy also investigates the life cycle of stars, from their birth in nebulae to their eventual death as supernovae, black holes, or neutron stars. Understanding stars is crucial in advancing our knowledge of the universe and the processes that govern its evolution over time.
What is a light-year?
A) The distance traveled by a shooting star
B) A measurement of a star's brightness
C) A unit of time used in astronomy
D) The distance light travels in one year
- 2. What is the term used for stars that explode in a massive burst of light?
A) Black Hole
B) Supernova
C) Pulsar
D) Nebula
- 3. What is the most abundant element in stars?
A) Helium
B) Hydrogen
C) Iron
D) Oxygen
- 4. What is a group of stars that form a recognizable pattern called?
A) Galaxy
B) Cluster
C) Nebula
D) Constellation
- 5. What is the process by which a star produces energy?
A) Gravitational collapse
B) Thermonuclear reaction
C) Nuclear fusion
D) Radioactive decay
- 6. What is the term for a collection of gas and dust in space where new stars are born?
A) Pulsar
B) Nebula
C) Quasar
D) Galaxy
- 7. What is the process by which a star like the Sun dies peacefully?
A) Supernova explosion
B) White dwarf collapse
C) Planetary nebula
D) Black hole formation
- 8. What is a small, dense remnant of a star that remains after a supernova explosion?
A) Black Hole
B) White Dwarf
C) Brown Dwarf
D) Neutron Star
- 9. Which star is considered the brightest in Earth's night sky?
A) Aldebaran
B) Betelgeuse
C) Sirius
D) Polaris
- 10. What property of a star is related to its color?
A) Luminosity
B) Distance
C) Temperature
D) Mass
- 11. What is the name for a star that suddenly increases greatly in brightness before fading back to its original luminosity?
A) Nova
B) White Dwarf
C) Brown Dwarf
D) Supernova
- 12. Which planet is named after the Roman god of war?
A) Jupiter
B) Mars
C) Saturn
D) Venus
- 13. Neutron stars are made almost entirely of which subatomic particle?
A) Quarks
B) Neutrons
C) Protons
D) Electrons
- 14. What feature of a star determines its ultimate fate?
A) Mass
B) Size
C) Luminosity
D) Temperature
- 15. Which star is at the center of our solar system?
A) Sirius
B) Alpha Centauri
C) Vega
D) Sun
- 16. What color are the coolest stars?
A) Blue
B) Red
C) White
D) Yellow
- 17. Which instrument is used to measure the brightness of stars?
A) Thermometer
B) Microscope
C) Barometer
D) Photometer
- 18. What is the bright center of a comet called?
A) Plasma sheath
B) Nucleus
C) Tail
D) Asteroid
- 19. What is a star known as when it has burned all of its fuel?
A) White dwarf
B) Supergiant
C) Red giant
D) Brown dwarf
- 20. What is the term for the brightness of a star as seen from Earth?
A) Luminosity
B) Absolute magnitude
C) Apparent magnitude
D) Spectral type
- 21. Which planet is known for its rings?
A) Jupiter
B) Neptune
C) Mars
D) Saturn
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