space

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Across
  1. 2. The force that pulls objects towards each other.
  2. 3. the planet that is seventh in order of distance from the sun and has a diameter of about 32,000 miles
  3. 5. The distance light travels in one year (nearly 6 trillion miles)
  4. 7. a heavenly body with such strong gravity that light cannot escape it and that is thought to be caused by the collapse of a massive star
  5. 11. A scientist who studies the universe.
  6. 12. the planet that is second in order of distance from the sun and has a diameter of about 7,500 miles
  7. 16. the planet that is sixth in distance from the sun and has a diameter of about 75,000 miles
  8. 17. the planet that is eighth in order of distance from the sun and has a diameter of about 31,000 miles
  9. 18. the planet that is nearest the sun and has a diameter of about 3000 miles
  10. 21. any large heavenly body that orbits a star
  11. 22. The area of air and gas that envelopes Earth and other astronomical objects
  12. 24. Everything that exists in space.
  13. 25. any of the heavenly bodies except planets which are visible at night and look like fixed points of light
Down
  1. 1. the planet that is fourth in order of distance from the sun, is known for its redness, and has a diameter of about 4200 miles
  2. 4. A person trained to travel in a spacecraft.
  3. 6. Particles thought to exist in space that don’t absorb, reflect or emit light, and thus can’t be observed.
  4. 8. Basic units of matter that every solid, liquid, gas and plasma is composed of
  5. 9. A body in space that resembles a small planet but lacks criteria to class it as such.
  6. 10. a smaller body that revolves around a planet
  7. 13. the planet that is thirds in distance from the sun. The planet that we live on.
  8. 14. the heavenly body in our solar system whose light makes our day and around which the planets revolve
  9. 15. An instrument that allows us to see into space.
  10. 19. the sun and the planets, asteroids, comets, and meteors that revolve around it
  11. 20. the planet that is fifth in order of distance from the sun and is the largest of the planets with a diameter of about 89,000 miles
  12. 23. A regular and repeating circuit that one celestial object takes around another.