Solar System

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Across
  1. 2. This is an apparent motion of planets moving back and forth in the night sky.
  2. 6. The coolest part and visible surface of the sun.
  3. 12. The two types of meteors are ____ and _____.
  4. 15. The only asteroid large enough to be considered a dwarf planet.
  5. 17. This model of the solar system shows the sun at the center.
  6. 22. Abbreviation for large eruptions of gasses that take a few days to reach Earth.
  7. 24. The dwarf planet with a 17 degree tilted orbit.
  8. 26. The shape of the planets orbits.
  9. 29. The astronomer discovered 4 of Jupiter’s moons and that Venus has phases.
  10. 30. The planet that rotates on its side.
  11. 31. Irregularly shaped planetary bodies found between Mars and Jupiter.
  12. 32. Planet often considered to be Earth’s twin.
  13. 33. The layer of the sun that can only be seen during an eclipse.
  14. 34. The planet that is sometimes further from the sun than Pluto.
  15. 35. The stream of energized gases emitted by the sun that travels throughout the solar system. (2 words)
  16. 37. The percent of the solar systems mass that is made up by the sun. (2 words)
  17. 39. Another term for gas giant or Jovian planets.
  18. 40. Space rocks that strike the Earth’s surface.
  19. 41. This scientist was the first to publish the heliocentric model.
  20. 42. The planet with the shortest day.
  21. 43. This model of the solar system shows the Earth at the center.
  22. 45. The largest of the dwarf planets.
  23. 46. Dark areas on the sun that are caused by an increased magnetic field.
  24. 47. A comets tail always points ______ from the sun.
  25. 49. The point on an orbit farthest from the sun.
  26. 50. The layer of the sun where energy travels out in waves.
  27. 51. The only other planet to have had a water cycle and evidence of possible life.
Down
  1. 1. Venus is the _______ planet (temperature wise).
  2. 3. Streams of gases that fall back to the sun, often along magnetic field lines.
  3. 4. The planet with the widest temperature range.
  4. 5. Another name for shooting stars – rocks that burn up in our atmosphere.
  5. 7. The direction all planets orbit the sun.
  6. 8. The unit of distance that represents the distance between the Earth and Sun. (2 words)
  7. 9. The number of dwarf planets in our solar system.
  8. 10. The layer of the sun where hot gases rise and cool gases sink.
  9. 11. The point on an orbit closest to the sun.
  10. 13. The center part of a comet that consists of solid rock and ice.
  11. 14. Venus’s ____ is longer than its _____. (2 words)
  12. 16. The number of major planets in our solar system.
  13. 18. This astronomer discovered the orbits were elliptical with the sun off center.
  14. 19. The solar system is five _______ years old.
  15. 20. The trail of dust from a comet.
  16. 21. The vapor cloud that surrounds the nucleus of a comet.
  17. 23. Large eruptions that shoot charged particles into space at the speed of light (2 words).
  18. 25. Rocks that float in space.
  19. 27. The center layer of the sun.
  20. 28. The planet with the most rings.
  21. 36. Bodies of rock and ice that orbit the sun.
  22. 37. The type of energy created in the sun.2 (2 words).
  23. 38. Another term for inner planets.
  24. 44. Are where many comets originate from. (2 words)
  25. 48. Glowing gases in our atmosphere (also called the Northern Lights).