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Home Q & A Board Science-Related Homework Help Physics Astronomy
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Carlina864 Carlina864
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6 years ago
A new generation of ground-based telescopes is currently being built that overcomes the limitations of the older large telescopes. Some of these new telescopes
 
  a. use segmented mirrors.
  b. use mirrors that are very thin.
  c. use active optics to control the shape of the mirror.
  d. all of the above.
  e. none of the above

Question 2

Pre-main sequence stars are above and to the right of the main sequence.
 
  Indicate whether the statement is true or false

Question 3

Ultraviolet radiation from a star
 
  a. will not penetrate Earth's atmosphere and reach the ground.
  b. has a wavelength that is longer than the visible light emitted by the star.
  c. has a wavelength that is shorter than the x-rays emitted by the star.
  d. a and b
  e. b and c
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grodriguezzgrodriguezz
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6 years ago
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Carlina864 Author
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6 years ago
This calls for a celebration Person Raising Both Hands in Celebration
sakoon
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Yesterday
Smart ... Thanks!
cipcal
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2 hours ago
Good timing, thanks!
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