Science 9-RSIDE

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Across
  1. 2. When the moon is fully illuminated.
  2. 5. With a gravitational pull so strong that nothing can escape it.
  3. 6. An astronomer and writer, and wrote many scientific books.
  4. 8. When a quarter of the moon is illuminated.
  5. 10. When the earth is blocking the sun from the moon.
  6. 14. Created the laws of planitary motion.
  7. 17. The first step in the birth of a star.
  8. 20. Is the change in frequency of a wave, or other periodic event, for an observer moving relative to its source.
  9. 21. The description of the cosmos where Earth is at the orbital center of all celestial bodies.
  10. 24. When a red dwarf burns out, it turns into this.
  11. 25. Small, exist most of their life as dim red dwarfs.
  12. 27. Is a scattergraph of stars.
  13. 31. The smallest and densest stars known to exist in the universe.
  14. 32. Part of a shadow in which all light from a given source is excluded.
  15. 34. A theory that places the Sun as the center of the universe, and the planets orbiting around it.
  16. 36. How the Earth turns.
  17. 37. Is the angle between an objects rotational axis and orbital axis.
  18. 38. Asterism in the constellation Ursa Major.
  19. 39. When the moon is blocking the sun from the earth.
  20. 40. The last step in the borth of a star, after the warm core begins to form.
Down
  1. 1. The shapes of the different illuminated portions of the Moon.
  2. 3. An Italian physicist, mathmetician, engineer and astronomer who played a major role in the scientific revolution during the Renaissance, he improved the telescope.
  3. 4. A white dwarf that has sufficiently cooled that it no longer emits significant heat or light.
  4. 7. Stars that have a lifetime that can range between 50 million to 20 billion years.
  5. 9. Known as a shooting star, or a falling star.
  6. 11. Constellation, also known as the Great Bear.
  7. 12. A mathmetician and astronomer who formulated a model of the universe that placed the sun rather than the earth at its center.
  8. 13. Stars that form like low mass stars, except much quicker.
  9. 15. People who studies the universe.
  10. 16. Space is filled with this. Made up of gas, mostly hydrogen, and dust.
  11. 18. A Telescope that uses infared light to find celestial bodies.
  12. 19. A portion of the light source is obscured by the occluding body.
  13. 22. A small and relatively cool star on the main sequence.
  14. 23. When a meteoroid, comet or steroid impacts with the ground.
  15. 26. An object in space made up of hot gases, with a core that is like thermonuclear reactor.
  16. 28. When massive stars collapse in on themselves causing a dramatic, massive explosion.
  17. 29. When the Sun reaches its highest or lowest excursion.
  18. 30. This process creates an enormous amount of energy.
  19. 33. A small rocky or metllic body travelling through space.
  20. 35. A specific pattern of stars in the sky.