Chapter 1.1 vocabulary: The Universe & Solar System

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Across
  1. 3. Immense gravity-bound cluster of billions of suns
  2. 4. To astronomers, any solid made of substances that vaporize easily
  3. 5. Tiny solid specks of rock-forming elements in space
  4. 9. Any push, pull, or twist
  5. 12. Science of how everything in existence is arranged and began; Greek for "order"
  6. 13. Any natural object found out in space (2 words)
  7. 14. Huge outer planet like Jupiter; also called Jovian (2 words)
  8. 15. Distance light travels in 12 months, about 9.46 trillion km (no hyphen)
  9. 16. Rocky or metal space object over 2 m wide; most lie between Mars and Jupiter
  10. 17. Large round body circling a star that has cleared its path; Greek for "wanderer"
  11. 20. Round object over 130 km wide that isn't a full planet; Pluto is one (2 words)
  12. 21. Imaginary line through a body's center that it spins around
  13. 22. Icy visitor that grows glowing tails when it nears the Sun
Down
  1. 1. Substance that vaporizes at low temperatures, like hydrogen (2 words)
  2. 2. Space containing hardly any matter
  3. 3. Point where a planet's spin line meets its surface, north or south (2 words)
  4. 6. Small, rocky inner planet such as Mars (2 words)
  5. 7. The Sun plus everything its gravity holds (2 words)
  6. 8. Substance like rock or metal that vaporizes only when very hot (2 words)
  7. 10. Closed path followed around a star or planet
  8. 11. Sizable solid object that orbits a planet
  9. 18. Everything that exists: all matter and energy
  10. 19. Immense glowing ball of gas and plasma powered by fusion; the Sun is one