Sun + Solar System

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Across
  1. 3. An object that orbits the sun and is spherical, but has not cleared the area of its orbit.
  2. 5. A large round pit caused by the impact of a meteoroid
  3. 6. the process by which energy is produced in stars.
  4. 9. The name often given to the four inner planets: Mercury, Venus, Earth, and Mars
  5. 10. This zone is the outermost layer of the sun’s interior.
  6. 11. A huge, reddish loop of gas that protrudes from the sun’s surface, linking parts of sunspot regions.
  7. 12. The central region of the sun, where nuclear fusion takes place.
  8. 14. One of the small asteroid-like bodies that formed the building blocks of the planets.
  9. 17. A dark area of gas on the sun’s surface that is cooler than the surrounding gases.
  10. 18. An eruption of gas from the sun’s surface that occurs when the loops in sunspot regions suddenly connect.
  11. 19. An object that orbits a star, is large enough to have become rounded by its own gravity, and has cleared the area of its orbit.
Down
  1. 1. A zone of very tightly packed gas in the sun’s interior where energy is transferred mainly in the form of electromagnetic radiation.
  2. 2. Dark, flat areas on the moon’s surface formed from huge ancient lava flows.
  3. 4. The effect of trapping heat near a planet’s surface by certain gases in the planet’s atmosphere.
  4. 7. The middle layer of the sun’s atmosphere.
  5. 8. A unit of distance equal to the average distance between Earth and the sun, about 150 million kilometers.
  6. 13. A chunk of rock or dust in space, generally smaller than an asteroid.
  7. 14. The inner layer of the sun’s atmosphere that gives off its visible light; the sun’s surface.
  8. 15. The system consisting of the sun and the planets and other objects that revolve around it.
  9. 16. Outer layer of the sun’s atmosphere, which looks like a white halo
  10. 17. A stream of electrically charged particles that emanate from the sun’s corona.