Space

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Across
  1. 1. A period of intense activity in a galaxy where lots of stars are formed.
  2. 3. be on or below a liquid surface and not sink to the bottom
  3. 4. A regular and repeating circuit that one celestial object takes around another.
  4. 5. When one celestial body blocks light from reaching another by moving between it and its light source.
  5. 7. star Streaks of light in the sky that occur when meteoroids fall into the Earth’s atmosphere and burn up.
  6. 9. The force that pulls objects towards each other
  7. 12. An instrument that allows us to see into space.
  8. 15. Moon of Saturn
  9. 16. A half of the Earth, when divided along the lines of either North and South or East and West.
  10. 19. Star A star (or galaxy) which is in the area being viewed by an astronomer but is not the object that they are actually looking at.
  11. 22. A person trained to travel in a spacecraft.
  12. 25. An astronomical object made of bright, glowing matter called plasma. They’re held together by gravity and are incredibly hot.
  13. 26. How much material an object is made up of, as opposed to weight which measures the pull of gravity on an object.
  14. 27. A group of stars, named by ancient astronomers because of their appearance (kind of like dot-to-dot). The twelve signs of the zodiac are named after twelve constellations.
  15. 29. Star Two stars that are attracted to each other by their respective gravitational pulls. They orbit around a point in between each other. Also known as Binary Star
  16. 31. Everything that exists in space.
  17. 32. A huge collection of gas, dust and billions of stars and their solar systems held together by gravity.
  18. 34. planet A body in space that resembles a small planet but lacks criteria to class it as such.
  19. 36. dust Small particles of matter in space.
  20. 39. The belief that the positions of the Sun, Moon, stars and planets can affect a person's destiny.
  21. 40. ship a spacecraft designed for interstellar travel.
Down
  1. 2. The three-dimensional expanse in which all material things exist.
  2. 3. moon of uranus
  3. 6. Objects made of frozen gases, rock and dust that orbit the Sun.
  4. 8. An object intentionally placed into space to orbit a celestial body to collect information.
  5. 10. A cavity in the ground of a celestial object, typically caused by explosions or meteor impact.
  6. 11. A small body of matter from outer space that enters Earth’s atmosphere and appears like a streak of light.
  7. 13. The star that objects in our solar system orbit.
  8. 14. dwarf Stars that are very small and cool compared to others.
  9. 17. relating to the sun or utilizing the energies of the sun
  10. 18. of View The area of sky that can be seen through a telescope. spiral galaxy typically has a rotating disc with spiral 'arms' that curve out from a dense central region.
  11. 19. star a star so distant that its motion can be measured only by very exact observations over long periods.
  12. 20. A measure of how closely packed matter is. Gas is less dense (less compact) than water. Water is less dense than a solid.
  13. 21. A large celestial object that acts as a natural satellite to Earth. Most planets in our solar system have at least one moon and some have several.
  14. 23. Small, rocky objects that orbit the Sun.
  15. 24. hole A place in space where the pull of gravity is so strong that even light can’t get out.
  16. 28. planets Planets whose orbits are outside the asteroid belt, including Jupiter, Saturn, Uranus and Neptune.
  17. 30. year The distance light travels in one year (nearly 6 trillion miles).
  18. 33. propel with force
  19. 35. completely empty.
  20. 37. A piece of rock or metal that lands on Earth’s surface.
  21. 38. Way Our galaxy that contains over 200 billion stars.