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Our universe
供稿人: Collins
  • 1. Absolute magnitude is the brightness of a star measured from ...
A) where it is
B) 1,000,000 km away
C) 1 light year away from earth
D) a stardard distance from earth
  • 2. Apparent magnitude how bright a star is measured from....
A) a stardard distance from earth
B) where it is
C) 1,000,000 km away
D) 1 light year way from earth
  • 3. What is the apparent magnitude of the sun?
A) -47
B) -27
C) 0
D) 7
  • 4. What is the apparent magnitude of the moon?
A) -24
B) -13
C) 14
D) 0
  • 5. What is the apparent magnitude of mars?
A) -14
B) -3
C) 3
D) 0
  • 6. What is the apparent magnitude of venus
A) 0
B) -5
C) -2
D) 2
  • 7. What is the apparent magnitude of the faintest object to the naked eye under perfect conditions?
A) -2.8
B) 6.5
C) 9.5
D) -.24
  • 8. What is the absolute magnitude of the sun?
A) 5
B) -15
C) -25
D) 25
  • 9. What relationship does the Hertzsprung-Russell diagram show?
A) The brightness and color of stars
B) All of the answers are correct
C) temperature and brightness of stars
D) The color and temperature of the stars
  • 10. What type of star is the sun on the Hertzsprung-Russell diagram?
A) giant
B) super giant
C) main sequence
D) white dwarf
  • 11. How are heat and color of a star related?
A) blue stars are the hottest
B) yellow stars are the hottest
C) White stars are the hottest
D) red stars are the hottest
  • 12. How are heat and color of a star related?
A) white stars are the coolest
B) red stars are the coolest
C) blue stars are the coolest
D) yellow stars are the coolest
  • 13. Most stars.....
A) are main sequence stars
B) will explode into a Nova or Super Nova
C) will become a black hole
D) will become a Nebula
  • 14. A white dwarf is....
A) None of the answers are correct
B) a start that has exploded
C) a extremely dense mass that no light can escape from
D) a cloud of gasses
  • 15. Which of the following is NOT a type of galaxy?
A) elliptical
B) irregular
C) conical
D) spiral
  • 16. What is the closest major galaxy to ours?
A) Crab Nebula
B) Hercules
C) Andromeda
D) Alpha Centuari
  • 17. The Big Bang Theory explains....
A) how stars explode
B) how the sound travels through space
C) how long it will take to travel in space
D) the formation of the universe
  • 18. Astronomers think the universe is about...
A) 4 billion years old
B) 100 million years old
C) 14 billion years old
D) 1 billion years old
  • 19. Is the universe "open" or "close"
A) It is not known at this time.
B) It is closed.
C) It is open.
  • 20. When "red shift" occurs....
A) Objects are moving toward you.
B) Red stars are moving toward you.
C) Objects are stationary.
D) objects are moving away from you
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