RiSa astronomy 2

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Across
  1. 4. A cloud of gas and dust in space where stars form
  2. 6. A rapidly spinning neutron star emitting beams of radiation
  3. 7. The closest star to Earth
  4. 8. The bending of light as it passes through different mediums
  5. 9. The space telescope that has provided stunning images of deep space
  6. 10. The effect used to measure the speed of stars and galaxies moving towards or away from us
  7. 12. The process by which stars generate energy through nuclear fusion
  8. 13. Unit of distance equal to the distance light travels in one year
Down
  1. 1. The range of electromagnetic radiation, including visible light
  2. 2. A transparent object that disperses light into its spectrum
  3. 3. A famous constellation known as "The Hunter"
  4. 5. The opening in a telescope that lets in light
  5. 6. A particle of light
  6. 8. The shift of light to longer wavelengths as objects move away
  7. 11. A curved piece of glass or plastic that focuses or disperses light