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Astro set 4

  1. Nicholas Copernicus book was called
    The Revolution of the HeavenlyOrbs
  2. All the following statements are true. Which
    one explains the reason that there is not a solar eclipse at
    every new moon?
    The orbital plane of the Moon is tilted slightly (by about 5 degrees) to the ecliptic plane.
  3. Based on observations of the universal
    expansion, the age of the universe is about ________.
    14 billion years
  4. How many arcseconds are in one arcminute?
    60
  5. He discovered that the orbits of planets are
    ellipses.
    Kepler
  6. What is the saros cycle?
    The roughly 18-year cycle over which the pattern of eclipses repeats
  7. What do astronomers mean by a constellation?
    A constellation is a region in the sky as seen from Earth.
  8. In the Greek geocentric model, the retrograde
    motion of a planet occurs when:
    The planet actually goes backward in its orbit around Earth.
  9. We cannot see a new moon in our sky because
    ________.
    a new moon is quite near the Sun in the sky
Author
dwrght16
ID
296674
Card Set
Astro set 4
Description
exam 1
Updated

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