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