Space Unit Test Study Guide

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Across
  1. 1. A star's spectral lines are shifted toward the red side of the visible light spectrum. this indicated that sthe star is moving _____ from earth.
  2. 6. Pluto and other objects past Neptune orbit the sun in the ___________ _______.
  3. 7. The size of Earth's moon, it was reclassified as a dwarf planet in 2006.
  4. 8. Moons are small bodies that ________ planets.
  5. 11. Venus, with its thick CO2 atmosphere, is the Slar System's hottest planet due to the ___________ effect.
  6. 12. A star's distance affects how bright it appears from Earth. This is __________ magnitude.
  7. 14. Venus' "twin" planet in the Solar System.
  8. 15. A contellation is a fixed, recognizable _________ of stars and galaxies, as well as the region of space around them.
  9. 16. The brightest object in the sky have the most ____________ numbers.
  10. 18. The color of the coolest stars.
  11. 19. Uranus' "twin planet," it is blue due to its frozen methane gas.
  12. 20. The method used to calculate the distance of stars less than 1,000 light-years from earth.
  13. 21. The distance light travels in a year - about six ____________ miles.
Down
  1. 2. ____________ magnitude compares stars by their true brightness, not taking their distance into account.
  2. 3. A star moving toward an observer would have spectral lines shifted toward the ______ part of the spectrum.
  3. 4. A famous storm on Jupiter that has lasted for centuries is the:
  4. 5. Several planets have rings, but Saturn's are clearly the most __________.
  5. 8. Earth supports life due to its moderate temperatures, liquid water and ________-rich atmosphere.
  6. 9. Due to its location close to the sun, this planet experiences the Solar System's widest temperature swings between day and night.
  7. 10. Viewing spectra of light from stars allow us to learn a star's temperature and ___________ from afar.
  8. 13. planet with recognizable volcanos.
  9. 17. Between the inner and outer planets is a region of small objects known as the ____________ belt.
  10. 21. Changing water levels on earth, they are caused by gravitational attraction between the moon, sun and earth.