Universe

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Across
  1. 2. when length of day and night are equal and the sun shining equally on both the northern and southern hemisphere
  2. 3. Galaxy a galaxy shaped like a pinwheel , with a central nucleus and spiral arms extending outward
  3. 7. the motion of an object that orbits or travels around another object
  4. 8. Shift when a star or galaxy is moving away from the earth its spectural pattern shifts towards the longer wavelength side of the spectrum due to the Doppler effec
  5. 9. cycle 28.9 day cycle where the moon waxes on with the lit side growing until it's full and then waning off until its new
  6. 11. systems of dust, gas, stars and interstellar matter
  7. 12. a division of the year that is characterized by recurring weather conditions and determined by both Earth's tilted axis relative to the sun in its position in orbit around the sun
  8. 13. tide a tide just after the quarter moons(first or third) when there's LEAST DIFFERENCE between high and low water (lowest tidal range)
  9. 15. giant most massive and luminous stars found above the main sequence when stars begin fusion helium causing them to grow
  10. 16. sprung Russel diagram a graph that shows the relationship between a star's luminosity, absolute magnitude, color and surface temperature
  11. 17. dwarf hot, dense, dim core of matter left after a star dies
  12. 19. fusion chemical reaction where the nucleus of two atoms combine to form a new element
  13. 22. longest or shortest day of the year where the sun is shining more on one of earth's hemispheres
  14. 23. tides the rise and fall of sea levels that usually occur twice daily (2 high and 2 low) changing every 6 hours, caused by the moon gravity
Down
  1. 1. Bang Theory the theory that all matter and energy in the universe was compressed into a single point that was extremely hot and dense causing it to explode and expanding in all direction
  2. 2. galaxy a spherical or elongated galaxy with a bright center and very little dust or gas
  3. 3. end stage of supermassive stars where a gigantic explosion throws matter out into space
  4. 4. force that pulls matter together forming stars or holding moons and planets in orbit around stars
  5. 5. matter a galaxy with no specific shape that is full of dust and gas resulting in a lot of new star formation
  6. 6. a large cloud of dust and gas where stars are born
  7. 9. the brightness of a star determined by the amount of EM energy a star emits
  8. 10. the diagonal region of the H-R diagram where stars spend most of their lives fishing hydrogen
  9. 12. class category a star is classified into based on its surface temperature with is measured in Kelvin (K)
  10. 14. tide a tide just after a new or full moon when there is the GREATEST DIFFERENCE between high and low water (highest tidal range)
  11. 18. tide as earth rotates, water is pulled up onto the shore, bulging at parts of earth that face directly toward or away from the moon
  12. 20. tide ocean water that is pulled away from the shorelines where points on earth that are not facing the moon at the moment
  13. 21. way Galaxy the spiral-shaped in which the sun and earth's solar system are located on a spiral arm about 3/4th away from the center