Solar System

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Across
  1. 2. radiation: a kind of radiation including visible light, radio waves, gamma rays, and X-rays.
  2. 4. moon at any time after new moon and before full moon, so called because its illuminated area is increasing.
  3. 9. oval
  4. 10. an imaginary line drawn around the earth equally distant from both poles.
  5. 11. an optical instrument designed to make distant objects appear nearer.
  6. 13. the angular distance of a place north or south of the earth's equator.
  7. 14. the angular distance of a place east or west of the meridian at Greenwich.
  8. 16. small rocky body orbiting the Sun.
  9. 19. the point in the orbit of a planet, asteroid, or comet at which it is closest to the sun.
  10. 21. tide: period of moderate tides when the sun and moon are at right angles to each other.
  11. 22. the force that attracts a body toward the center of the earth.
  12. 24. the angular distance of a point north or south of the celestial equator.
  13. 26. the time or date at which the sun crosses the celestial equator.
  14. 27. the point in the orbit of a planet, asteroid, or comet at which it is furthest from the sun.
  15. 28. a group of stars forming a recognizable pattern.
  16. 31. a progressively smaller part of its visible surface illuminated.
  17. 33. that earth orbits.
  18. 35. a way in which heat travels causing hot air to rise and cold air to sink.
  19. 36. system: the collection of eight planets and their moons in orbit around the sun.
  20. 38. a celestial body moving in an elliptical orbit around a star.
  21. 39. tide:a tide just after a new or full moon
  22. 40. single-stranded sequence of DNA.
  23. 41. the natural satellite of the earth, visible by reflected light from the Sun.
Down
  1. 1. the act of rising to an important position or a higher level.
  2. 3. action by a celestial body of going round in an orbit.
  3. 5. motion: Kepner's law.
  4. 6. a meteor that survives its passage through the earth's atmosphere such that part of it strikes the ground.
  5. 7. unit: the average distance from the center of the earth to the center of the Sun.
  6. 8. cosmic snowballs of frozen gases, rock and dust that orbit the Sun.
  7. 12. representing the sun as the center.
  8. 15. shadow cast by the earth or moon over an area experiencing a partial eclipse.
  9. 17. planet: a celestial body resembling a small planet but lacking a certain criteria that is required for it to be classed as such.
  10. 18. a small body moving in the solar system that would become a meteor if it entered the earth's atmosphere.
  11. 20. the action of rotating around an axis or center.
  12. 23. a large body of matter in orbit around the sun/star thought to be developing into a planet
  13. 25. eclipse: an eclipse in which the sun is obscured by the moon.
  14. 29. and falling of the sea due to the moon.
  15. 30. representing the earth as the center.
  16. 32. small body from outer space that enters the earth's atmosphere.
  17. 33. autumn, spring, winter, summer
  18. 34. burning ball of gas.
  19. 37. the fully shaded inner region of a shadow cast by an opaque object.