The New Astronomy

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Across
  1. 3. is visible to the human eye
  2. 5. measure of how closely packed matter is, expressed in grams/ cubic centimeters
  3. 6. the visual shift slightly back and forth each year of the stars, based on where we are viewing it from either side of earth's orbit
  4. 8. radiation, also known as heat radiation, refers to the radiation that has wavelengths longer than
  5. 10. period, the period of time that it takes an object to spin on its axis once
  6. 11. unit, a unit of distance, AU, which is based on the average distance between the earth and sun
Down
  1. 1. radiation, the name for invisible wavelengths of light
  2. 2. satellites, refers to the four largest moons of Jupiter, named for the person who discovered them
  3. 4. refers to how long a light wave is
  4. 7. a process where a large atom, such uranium, fissions of breaks into smaller atoms, releasing a lot of energy
  5. 9. smaller atoms combining into larger atoms, creating energy