Unit 3 Space Vocabulary

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Across
  1. 3. A device sent into space to gather information and explore space.
  2. 5. Huge collections of stars.
  3. 6. The daily rise and fall of the sea level.
  4. 12. A rotating disk of gas and dust surrounding a newly formed star.
  5. 15. A cloud of gas and dust.
  6. 17. The theory that states that the universe started at one point and has been expanding ever since.
  7. 20. A graph that plots the relationship between a star’s luminosity and its temperature.
  8. 22. An instrument that spreads light into different wavelengths.
  9. 24. The distance that light travels in 1 year.
  10. 25. A huge explosion that destroys a star.
  11. 26. A hot and dense, slowly cooling sphere of carbon.
Down
  1. 1. Everything that exists.
  2. 2. The path that an object follows as it moves around a different object.
  3. 4. A spiral galaxy that our solar system is located in.
  4. 7. The shift to a different wavelength on the electromagnetic spectrum.
  5. 8. When the nuclei of several atoms combine, and they make one larger nucleus.
  6. 9. The amount of matter that is in an object.
  7. 10. The gravitational force exerted on an object.
  8. 11. An attractive force that is between all objects that have mass.
  9. 13. An instrument that is designed to make far away objects appear closer, either with lenses (refracting), or with mirrors (reflecting).
  10. 14. A moon, planet, or machine that orbits a planet or star.
  11. 16. A large ball of gas held together with gravity. Its core is so hot that nuclear fusion can occur.
  12. 18. It occurs just after the full or new moon, and the tide is larger.
  13. 19. It occurs when the moon is in the first or third quarter, and the tide is smaller.
  14. 21. An object where its gravity is so great that no light can escape.
  15. 23. A spectrum of electromagnetic radiation emitted by a source.