Space Puzzle

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Across
  1. 2. japan's module name on ISS
  2. 5. fastest known entity in the universe
  3. 6. former name for International Space Station
  4. 7. type of black hole at the centre of our Milky Way galaxy
  5. 10. region in space where force of gravity is so strong, not even light can escape
  6. 12. communication networking in space is done through this
Down
  1. 1. number of times Hubble Space Telescope revolves around earth in a day
  2. 3. device to measure gravitational waves
  3. 4. Russian's module that powers ISS
  4. 7. type of black hole formed when massive stars (10-20 times the mass of sun) stars die
  5. 8. boundary of a black hole; a point of no return
  6. 9. imaging in Hubble Space Telescope is done by this device
  7. 11. Life centre of Russian Orbital segment on ISS
  8. 13. structure on ISS that acts like its backbone