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Our universe
Con il contributo di: 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) 1 light year way from earth
B) a stardard distance from earth
C) where it is
D) 1,000,000 km away
  • 3. What is the apparent magnitude of the sun?
A) -47
B) 0
C) 7
D) -27
  • 4. What is the apparent magnitude of the moon?
A) -24
B) -13
C) 0
D) 14
  • 5. What is the apparent magnitude of mars?
A) -14
B) -3
C) 0
D) 3
  • 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) -2.8
B) 6.5
C) 9.5
D) -.24
  • 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) 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) white dwarf
B) giant
C) main sequence
D) super giant
  • 11. How are heat and color of a star related?
A) yellow stars are the hottest
B) White stars are the hottest
C) red stars are the hottest
D) blue stars are the hottest
  • 12. How are heat and color of a star related?
A) red stars are the coolest
B) yellow stars are the coolest
C) white stars are the coolest
D) blue stars are the coolest
  • 13. Most stars.....
A) will become a black hole
B) will become a Nebula
C) are main sequence stars
D) will explode into a Nova or Super Nova
  • 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) irregular
B) spiral
C) conical
D) elliptical
  • 16. What is the closest major galaxy to ours?
A) Crab Nebula
B) Alpha Centuari
C) Hercules
D) Andromeda
  • 17. The Big Bang Theory explains....
A) how stars explode
B) the formation of the universe
C) how long it will take to travel in space
D) how the sound travels through space
  • 18. Astronomers think the universe is about...
A) 14 billion years old
B) 4 billion years old
C) 1 billion years old
D) 100 million years old
  • 19. Is the universe "open" or "close"
A) It is closed.
B) It is not known at this time.
C) It is open.
  • 20. When "red shift" occurs....
A) objects are moving away from you
B) Objects are moving toward you.
C) Red stars are moving toward you.
D) Objects are stationary.
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