Across
- 1. 28.9 day cycle where the moon waxes on with the lit side growing until its full and then waneing off until its new (not seen) again.
- 2. a galaxy with no specific shape that is full of dust and gas resulting in a lot of new star formation
- 7. Systems of dust, gas, stars and interstellar matter
- 9. Ocean water that is pulled away from the shorelines where points on Earth that are not facing the moon at the moment
- 12. most masssive and luminous (biggest and brightest) stars found above the main sequence when stars begin fusion helium causing them to grow
- 16. chemical reaction where the nucleus of two atoms combine to form a new element
- 18. the hot, dense, dim core of matter left after a star dies
- 19. force that pulls matter together forming stars or holding moons and planets in orbit around stars
- 21. the brightness of a star determined by the amount of EM energy a star emits
- 23. the spiral-shaped galaxy in which the Sun and Earth's Solar System are located on a spiral arm about 3/4th away from the center
- 24. a tide just after the quarter moons (first or third) when there's the least difference between high and low water (lowest tidal range)
- 25. a division of the year that is characteriszed by recurring weather conditions and determined by both Earth's tilted axis relative to the sun in its position in orbit around the sun.
- 26. the rise and fall of sea levels that usually occur twice daily (2 high and 2 low per day) changing every 6 hours, caused by the moon's gravity
Down
- 1. 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 expand in all directions.
- 3. a galaxy shaped like a pinwheel, with a central nucleus and spiral arms extending outward
- 4. When a star or galaxy is moving away from the earth its spectral pattern shifts towards the longer wavelength side of the spectrum due to the doppler effect
- 5. a graph that shows the relationship between a star's luminosity, absolute magnitude, color and surfact temperature
- 6. a tide just after a new or full mood when there is the greatest difference between high and low water (highest tidal range)
- 8. as Earth rotates, water is pulled up onto the shore, bulging at parts of Earth that face directly toward or away from the moon.
- 10. the longest or shortest day of the year where the sun is shining more on ofe of earth's hemispheres
- 11. a spherical or elongated galaxy with a bright center and very little dust and gas
- 13. end stage of supermassive stars where a gigantic explosion throws matter out into space
- 14. category a star is classified into based on its surface temperature which is measured in Kelvin.
- 15. the motions of an object that orbits or travels around another object
- 17. a large cloud of dust and gas where stars are born
- 20. when the length of a day and a night are equal and the sun is shining equally on both the norther and southern hemisphere
- 22. the diagonal region on the H-R diagram where stars spend most of their lives fusing hydrogen