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