Planetary Science

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Across
  1. 3. the region of the solar system beyond the orbit of Neptune; plutoids are located here. lunar resembling the moon
  2. 6. how long it takes an object to orbit another object
  3. 7. the oldest exposed areas of the Moon's surface, extensively cratered, chemically different, and higher in elevation than the maria.
  4. 10. the stage of a star when it has no more fuel for nuclear reactions
  5. 12. the name of the galaxy the Sun is a part of
  6. 13. the spectrum of wavelengths that our eyes can detect, including red, orange, yellow, green, blue,and violet
  7. 16. a crater that has central peaks and ejecta thrown out in long rays.
  8. 19. when Earth is exactly between the Moon and the Sun, and the Moon passes through Earth’s shadow.
  9. 23. a representation of thinking to help others understand your thinking
  10. 24. a Moon shape that is larger than a first or third quarter Moon but smaller than a full Moon
  11. 25. the assemblage of objects, distances, and directions that you use to establish the location of something.
  12. 26. the Earth’s natural satellite
  13. 28. each different shape of the Moon
  14. 29. an imaginary axle that a planet spins on.
  15. 30. a streak of light in the sky from gravel- and pebble-size meteoroids; also known as a shooting star
  16. 32. a planet orbiting a star other than the Sun.
  17. 34. the range of electromagnetic radiation arranged in order of energy level.
  18. 36. an object that orbits a star and is massive enough for its own gravity to force it into a spherical shape
  19. 37. a collection of interacting parts
  20. 38. traveling around something
Down
  1. 1. a theory that one explosion created the universe.
  2. 2. an object that orbits the Sun and is big enpugh to be round but doesnt clear away all objects near its orbit.
  3. 4. the reference star pointed to by Earth’s North Pole
  4. 5. a region of space occupied by a system of objects, including the Sun and all things orbiting it
  5. 8. a chunk of ice,dust, and rock material a few kilometers in size.
  6. 9. an enormous collection of tens of millions to hundreds of billions of stars, interstellar gas, and dust.
  7. 11. a day of the year when the Sun's rays shine straight down on the equator.
  8. 14. the path and length of time one object takes to travel around another object
  9. 15. the phase of the Moon that occurs when the Moon is opposite the Sun as seen from Earth.
  10. 16. a change in land created by an impact
  11. 17. a bright line of a spectrum, indicating the wavelength of emitted light.
  12. 18. a small,rocky object that orbits the Sun.
  13. 20. the remains of organisms that lived long ago preserved as oil,coal, or natural gas.
  14. 21. a layer of gases that surround an onject, held in place by gravity.
  15. 22. a cloud of gas and dust in space between stars
  16. 27. a small or medium-size piece of rock or metal from space
  17. 31. the sum total of all things that can be observed or detected
  18. 33. the stage of a star when it becomes very large and has a relatively cool nature.
  19. 35. the dark surface of cooled magma in a flooded crater