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Stars and Galaxies
  • 1. What color star has the highest surface temperature?
A) white
B) yellow
C) red
D) blue
  • 2. Which means the same as luminosity?
A) apparent brightness
B) intrinsic brightness
C) brightness
D) absolute brightness
  • 3. Which is not part of a spiral galaxy?
A) halo
B) nuclueus
C) spiral arms
D) super cluster
  • 4. What is the most important factor that causes matter in a nebula to form clumps?
A) rotation
B) molecular motion
C) heating
D) gravitational attraction
  • 5. Which magnitude describes the brightest star?
A) 1.3
B) -2.5
C) -0.5
D) 2.5
hr
  • 6. What is measured on the Y-axis?
A) diameter
B) luminosity
C) color
D) temperature
hr
  • 7. Which type of star is located in the bottom center of the diagram?
A) white dwarf
B) supergiant
C) giant
D) main sequence star
hr
  • 8. What type of star is topmost in the diagram?
A) giant
B) white dwarf
C) supergiant
D) Sun-like
  • 9. About how long does it take light from the Sun to reach Earth?
A) 8 seconds
B) 8 hours
C) 8 minutes
D) 8 days
  • 10. The most massive stars end their lives as which type of object?
A) black dwarf
B) white dwarf
C) black hole
D) neutron star
  • 11. Which is a group of stars, gas, and dust held together by gravity?
A) constellation
B) black hole
C) supergiant
D) galaxy
  • 12. Which is the most abundant element in the Sun?
A) oxygen
B) carbon
C) hydrogen
D) helium
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