The Sun

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Across
  1. 4. the force that pulls objects toward one another
  2. 5. dark spots that appear on the Sun's surface
  3. 6. the gases that surround Earth and other planets
  4. 8. nebula a huge cloud if dust and gas from which stars form
  5. 11. machines that are sent into space to circle around planets, moons, stars and other objects
  6. 12. the outermost part of the Sun's atmosphere
  7. 13. an imaginary circle around a star or planet that is an equal distance from each pole
Down
  1. 1. either end of a planet or star; every planet or star has two
  2. 2. a type of white or yellow star with a temperature between 9,000 and 10,000 degrees Fahrenheit
  3. 3. along with the corona, the outer part of the Sun's atmosphere
  4. 5. flares sudden bursts of energy from the Sun's surface
  5. 7. the innermost part of the Sun
  6. 8. eclipse an event in which the Moon moves between Earth and the Sun
  7. 9. a group of stars and solar systems
  8. 10. the Sun's surface