Astronomy, Unit 7

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Across
  1. 6. the outermost layer of the sun's atmosphere
  2. 8. The movement of an object around another object.
  3. 9. the darkest part of a shadow during an eclipse;
  4. 11. When the tidal range is greatest. (full moon and new moon)
  5. 13. A less than average tide occurring at the first and third quarters of the moon
  6. 17. The distance that light travels in one year.
  7. 18. the lighter portion of shadow during an eclipse (makes partial eclipse)
  8. 21. the fourth planet from the Sun and is the second smallest planet in the solar system
  9. 22. the zone of the sun's interior that is between the core and the convective zone and in which energy moves by radiation
  10. 24. color on an HR diagram of the hottest and brightest stars
  11. 25. a ball of ice and dust whose orbit is a long, narrow ellipse.
  12. 27. The explosion of a dying giant or supergiant star.
  13. 30. The two days of the year on which neither hemisphere is tilted toward or away from the sun.
  14. 31. The name given to the four outer planets: Jupiter, Saturn, Uranus, and Neptune.
  15. 32. planet with a distinct bluish-green color, & rotates on an axis nearly parallel to the plane of its orbit
  16. 35. a round pit on the moon's surface.
  17. 38. objects that are revolving around the sun that are to small and too numerous to be considered planets.
  18. 39. Moon phase in which less than half of the Moon appears to be illuminated.
  19. 42. layer of the sun's atmosphere--the surface of the sun
  20. 43. A giant structure that contains hundreds of billions of stars.
  21. 44. a cooler darker spot appearing periodically on the sun's photosphere
  22. 45. Largest planet, has a giant hurricane
Down
  1. 1. initial stage of a star's life cycle in which a star fuses hydrogen to make helium and energy
  2. 2. a graph relating the surface temperatures and absolute brightness of stars
  3. 3. The middle layer of the sun's atmosphere
  4. 4. The partial or total blocking of one object by another.
  5. 5. An imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates.
  6. 7. has no atmosphere, furthest out, high methane content
  7. 10. type of eclipse with the blocking of sunlight to the moon that occurs when Earth is directly between the sun and moon.
  8. 11. type of eclipse with the blocking of sunlight to Earth that occurs when the moon is between the sun and Earth.
  9. 12. a meteoroid that has hit Earth's surface.
  10. 14. the period during which the visible surface of the moon decreases
  11. 15. a streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere.
  12. 16. Smallest planet, closest to sun
  13. 19. The remains of an extremely massive star pulled into a small volume by the force of gravity.
  14. 20. third planet from the sun
  15. 23. region around the sun's radiative zone in which moving gases transfer energy
  16. 26. More than half but less than fully illuminated
  17. 28. describes phases following a new moon, as more of the Moon's lighted side becomes visible
  18. 29. the second largest planet and is best known for its ring system, would float in water
  19. 33. color on an HR diagram of cool and dim stars
  20. 34. The two days of the year on which the noon sun is directly overhead at either 23.5 degrees South or 23.5 degrees North.
  21. 36. The spinning motion of a planet about its axis.
  22. 37. Center of the sun where nuclear fusion is occurring
  23. 40. broken up lunar rocks; inorganic moon soil
  24. 41. has a dense atmosphere w/ high temps, sometimes called Earth's twin