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Luasene Luasene
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6 years ago
Why can't the Moon always pass through the center of the umbra?
 
  a. The Moon's rotation is slightly faster than its revolution around Earth.
  b. The Moon's orbit is inclined by 5 degrees to the plane of Earth's orbit.
  c. The Moon's synodic cycle changes a few minutes per cycle.
 d. The Moon's orbit changes with the seasons.
 e. The Moon is not in its full moon lunar phase.

Question 2

What unit would best describe the linear diameter of a planetary body?
 
  a. arc seconds
  b. arc minutes
  c. degrees
 d. kilometers
 e. radians

Question 3

Calculate the angular diameter of the Moon with these known facts: Moon's linear diameter = 3480 km Moon's average distance from Earth = 384,000 km number of arc seconds in 1 radian = 2.06 x 105
 
  a. 31 arc seconds
 b. 187 arc seconds
 c. 1750 arc seconds
  d. 1870 arc seconds
  e. 1910 arc seconds
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nick1028nick1028
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6 years ago
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Luasene Author
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6 years ago
All correct!
wrote...
6 years ago
Happy to help
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