Space Exploration Crossword Puzzle

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Across
  1. 2. - small pieces of rocks flying through space with no particular path
  2. 4. - vast clouds of gas and dust in space
  3. 9. - used for centuries to make accurate charts of star positions
  4. 11. - a vehicle used for travelling or carrying things into space, which is shaped like a big tube
  5. 14. - proposed by Nicolas Copernicus
  6. 15. - measures a star’s height above the horizon
  7. 16. - an enormous explosion that marks the death of a massive star
  8. 20. - comes from Latin meaning sun and stop
  9. 21. - based on the geometry of a triangle
  10. 22. - a meteor that lasts long enough to hit Earth’s surface
  11. 24. - proposed by Aristotle
  12. 25. - Russian word for satellite
Down
  1. 1. - an optical instrument that makes far away objects look closer by using a special arrangement of lenses and mirrors
  2. 3. - grouping of millions or billions of stars, gas, and dust
  3. 5. - comes from Latin meaning equal and night
  4. 6. - the apparent shift in position of a nearby object when the object is viewed from two different places
  5. 7. - groupings of stars we see as patterns in the night sky
  6. 8. - hot, glowing ball of gas that gives off tremendous light energy
  7. 10. - the intrinsic brightness of a celestial object
  8. 12. - the only planet where water exists in all three phases: solid, liquid, and gases
  9. 13. - objects that are built and sent to Earth’s orbit by humans
  10. 17. - the asteroid that is only 33km long and 13 km wide
  11. 18. - “dirty snowballs”
  12. 19. - so-called “shooting stars” that can often be seen streaking across the night sky
  13. 23. - refers to the highest point directly overhead