Our Solar System and Beyond

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Across
  1. 1. really large; enormous in number, size, or distance
  2. 4. Minor, the constellation made of seven stars named by Ptolemy that is also called the Little Bear; it is the Little Dipper
  3. 6. Major, the constellation named by Ptolemy that is also called Big Bear; it includes the Big Dipper
  4. 8. a very large cluster of billions of stars, dust, and gas held together by gravity and separated from other star systems by a large amount of space (galaxies)
  5. 11. to send a rocket into outer space (launched)
  6. 12. uneven; not regular in shape, size, or other characteristics
  7. 14. distance traveled by light over a period of years; a measure of length used in astronomy (light-year)
  8. 16. a force that pulls things toward one another
  9. 19. curved in shape; gradually winding around a center point
  10. 20. a very large number (billions)
Down
  1. 2. a scientist who studies stars, planets, and outer space (astronomers)
  2. 3. a place used to observe the sun, moon, stars, and outer space (observatories)
  3. 5. a number of things of the same kind that are together in a group
  4. 7. Galaxy, the spiral galaxy that is closest to the Milky Way Galaxy
  5. 9. join together (fusion)
  6. 10. the North Star; the brightest star at the end of the handle of Ursa Minor/Little Dipper that stays in the same place in the night sky all year long
  7. 13. the tiny particles from which all substances are made
  8. 15. Way Galaxy, the galaxy that contains Earth and the solar system in which it lies
  9. 17. a person who travels into outer space
  10. 18. stars that form a pattern or shape that looks like things, such as a person, an object, or an animal, as seen from Earth (constellations)