Space Crossword Puzzle

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Across
  1. 5. a streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere
  2. 6. a device expels gas in one direction to move in the opposite direction
  3. 7. the outer layer of the sun's atmosphere
  4. 8. a loose collection of ice, dust, and small rocky particles, typically with long, narrow orbit
  5. 9. Zone a region of very tightly packed gas in the sun's interior where energy is transferred mainly in the form of light
  6. 13. a dark area of gas on the sun's surface that is cooler than surrounding gases
  7. 15. the middle layer of the sun's atmosphere
  8. 18. the study of stars, moons, and other space objects
  9. 19. a huge, reddish loop of gas that protrudes from the sun's surface, linking parts of sunspot regions
  10. 20. the partial or total blocking one object in space by another
  11. 22. the movement of an object around another object
  12. 23. a chunk of rock or dust in space
  13. 25. rocky objects revolving around the sun that are too small and numerous to be considered planets
  14. 26. the force that pulls objects toward each other
  15. 27. Cloud a spherical region of comets that surrounds the solar system
Down
  1. 1. the path of an object as it revolves around another object in space
  2. 2. Flare an eruption of gas from the sun's surface that occurs when the loops in sunspot regions suddenly connect
  3. 3. Fusion the process by which hydrogen atoms join together in the sun's core to form helium
  4. 4. any object that orbits around another object in space
  5. 5. a meteoroid that passes through the atmosphere and hit Earth's surface
  6. 8. Zone the outermost layer of the sun's interior
  7. 10. Belt the region of the solar system between the orbits of Mars and Jupiter, where many asteroids are found
  8. 11. the tendency of an object to resist any change in its motion
  9. 12. Belt a doughnut-shaped region that stretches from beyond Neptune's orbit to about 100 times Earth's distance from the sun
  10. 14. Effect the trapping of heat by the planet's atmosphere
  11. 16. the inner layer of the sun's atmosphere that gives off its visible light
  12. 17. an oval shape, which may be elongated or nearly circular
  13. 21. the central region of the sun, nuclear fusion takes place
  14. 24. the spinning motion of a planet on its axis