Space- Glossary Terms

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  1. Chapter 7:
    Celestial Object
  2. Any object that exists in space, such as a planet, a star, or the moon.
  3. Astronomer
  4. A scientist who studies astronomy.
  5. Revolution
  6. The time it takes for an object to orbit another object; Earth's revolution around the sun is 365.24 days.
  7. Rotation
  8. The turning of an object around an imaginary axis running through it; Earth's rotation around its axis is 24h
  9. Constellation
    A group of stars that seem to form a distinctive pattern in the sky.
  10. A group of stars that seem to form a distinctive pattern in the sky.
  11. Light-year
    The distance that light travels in one year
  12. The distance that light travels in one year
  13. Apparent-magnitude
    The brightness of a star as seen from Earth
  14. Asterism
    A smaller group of stars that form patterns within a constellation.
  15. Tides
    The rising and falling of ocean waters caused by the Moon's and  Earth's gravity
  16. Phrases of the Moon
    The monthly progression of changes in the appearance of the Moon that result from different portions of the Moon's sunlit side being visible from Earth.
  17. Lunar Eclipse
    The phenomenon in which the full Moon passes into Earth's shadow.
  18. Solar Eclipse
    The phenomenon in which the shadow of the Moon falls on Earth's surface.
  19. Solar System
    A group of planets that circle one or more stars
  20. Retrograde Motion
    The movement of an object in the sky, usually a planet, from east to west, rather than its normal motion from west to east; this effect is generally produced when Earth is passing the planet in its orbit.
  21. Astronomical unit
    The average distance between Earth and Sun
  22. Orbital Radius
    The average distance between the Sun and an object that is orbiting the Sun.
  23. Geocentric Model
    A model of the solar system stating that Earth is the centre of all planetary motion, with the planets and the Sun travelling in perfect circle around Earth.
  24. Heliocentric Model
    A model of the solar system in which the Sun is in the centre with the planets orbiting it.
  25. Comet
    An object composed of rocky material, ice and gas; comes from the Kuiper Belt or Oort Cloud
  26. Asteroid
    An object in space that ranges in size from a tiny speck, like a grain of sand, to 500km wide. Most asteroids originate in the asteroid belt between Mars and Jupiter.
  27. Meteoroid
    A rock moving through space
  28. Meteor
    A meteoroid that hits Earth's atmosphere and burns up
  29. Meteorite
    A meteoroid that is large enough to pass through Earth's atmosphere and reach the ground, without being totally burned up
  30. Trans- Neptunian Object
    An object that circles the sun beyond the orbit of Neptune.
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Space- Glossary Terms
2014-02-10 23:37:18
Flashcards for space
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