Astronomy

allison P.
20 words 27 learners

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Full list of words from this list:

words only definitions & notes
  1. revolution
    a single complete turn
  2. rotation
    the act of turning as if on an axis
  3. axis
    the center around which something rotates
  4. retrograde
    moving or directed or tending in a backward direction
  5. atmosphere
    the envelope of gases surrounding any celestial body
  6. astronomy
    the branch of physics that studies celestial bodies
  7. astronomer
    a physicist who studies celestial bodies and the universe
  8. astronaut
    a person trained to travel in a spacecraft
  9. Astronomical Unit
    a unit of length used for distances within the solar system
  10. meteor
    a small, solid space object that has entered Earth's atmosphere
  11. meteorite
    a stony or metallic object from space that hits the earth
  12. asteroid
    a small celestial body composed of rock and metal
  13. comet
    a small frozen mass that travels around the sun
  14. phase
    the particular appearance of a body's state of illumination
  15. satellite
    any celestial body orbiting around a planet or star
  16. terrestrial
    of or relating to or characteristic of the planet Earth
  17. gas giant
    any of the four outermost planets in the solar system
  18. light-year
    the distance that light travels in a vacuum in 1 year
  19. eclipse
    the phenomenon when one celestial body obscures another
  20. solar wind
    a stream of protons moving radially from the sun
Created on Fri May 03 11:28:05 EDT 2013

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