Astronomy Key Terms

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Across
  1. 2. This planet appears to roll
  2. 4. a person who studies astronomy
  3. 5. The study of the universe and the objects in it
  4. 7. a celestial object that orbits one or more stars
  5. 8. (2 words) A massive explosion at the surface of the sun
  6. 9. The universe arose from a infinitely dense point
  7. 10. a gas giant with The Great Red Spot
  8. 11. refers to objects humans see in the night sky
  9. 12. (2 words) The average distance between the sun and earth, 150 million km
  10. 14. A planet with distinctive rings
  11. 15. a collection of hundreds of billions of stars held with gravity
  12. 16. when a star explodes
  13. 18. a smaller recognizable pattern of stars within a constellation
  14. 19. a region on the sun's surface that is cooler than the surrounding areas
  15. 20. (2 words) the distance that a beam of light can travel in one year
  16. 21. the furthest planet from the sun in our solar system
  17. 22. The "red" planet
Down
  1. 1. The name of the planet that rotates from east to west
  2. 2. everything that physically exists including space and time
  3. 3. (2 words) The process in which the nuclei of atoms fuse together and form larger atoms
  4. 4. another name for the northern lights
  5. 6. a hot ball of plasma with nuclear fusion at its core
  6. 11. a group of stars that, from earth, resembles a recognizable form
  7. 13. (2 words) The sun together with all the planets and objects held together by the sun's gravity and orbiting around it
  8. 17. a large cloud of dust and gas found out in deep space