Earth/Sun/Moon

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Author:
sineadva
ID:
184312
Filename:
Earth/Sun/Moon
Updated:
2012-11-18 23:14:35
Tags:
Science
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Description:
Earth/Sun/Moon
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  1. rotation
    object spinning on its axis
  2. revolution
    object revolving around another object
  3. solar eclipse
    when Moon comes directly between the Earth and Sun, Moon casts a shadow on part of Earth
  4. lunar eclipse
    Earth comes directly between the Moon and Sun, casts shadow on Moon
  5. Moon Phase Order:
    new moon, waxing cresent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, waning cresent
  6. solar noon:
    Sun is at its highest point in sky
  7. umbra
    dark inner portion of a shadow
  8. penumbra
    lighter, outer portion of a shadow
  9. ecliptic
    sun's apparent path across the sky
  10. Polaris
    name of star that the northern end of Earth's axis is always on
  11. measure of degrees of the tilt of Earth's axis
    23.5
  12. astronomical unit
    distance of Earth to Sun (150million km)
  13. force that pulls Moon towards Earth
    gravity
  14. what causes day and night
    Earth's rotation because when it spins, it will turn away from the Sun and come back in 24 hours
  15. totality
    when the body casting a shadow completely covers a smaller body or when a smaller body's shadow completely covers a smaller body

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