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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) a stardard distance from earth
C) 1 light year away from earth
D) 1,000,000 km away
  • 2. Apparent magnitude how bright a star is measured from....
A) where it is
B) a stardard distance from earth
C) 1 light year way from earth
D) 1,000,000 km away
  • 3. What is the apparent magnitude of the sun?
A) -47
B) -27
C) 7
D) 0
  • 4. What is the apparent magnitude of the moon?
A) 14
B) 0
C) -13
D) -24
  • 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) -5
B) 0
C) -2
D) 2
  • 7. What is the apparent magnitude of the faintest object to the naked eye under perfect conditions?
A) -.24
B) 9.5
C) 6.5
D) -2.8
  • 8. What is the absolute magnitude of the sun?
A) -15
B) -25
C) 5
D) 25
  • 9. What relationship does the Hertzsprung-Russell diagram show?
A) All of the answers are correct
B) The brightness and color of stars
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) 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) yellow stars are the coolest
B) blue stars are the coolest
C) red stars are the coolest
D) white 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) None of the answers are correct
B) a cloud of gasses
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) irregular
B) conical
C) elliptical
D) spiral
  • 16. What is the closest major galaxy to ours?
A) Hercules
B) Crab Nebula
C) Andromeda
D) Alpha Centuari
  • 17. The Big Bang Theory explains....
A) how the sound travels through space
B) the formation of the universe
C) how stars explode
D) how long it will take to travel in space
  • 18. Astronomers think the universe is about...
A) 4 billion years old
B) 14 billion years old
C) 1 billion years old
D) 100 million years old
  • 19. Is the universe "open" or "close"
A) It is open.
B) It is closed.
C) It is not known at this time.
  • 20. When "red shift" occurs....
A) Objects are moving toward you.
B) Objects are stationary.
C) Red stars are moving toward you.
D) objects are moving away from you
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