Happy Birthday Uncle Peter!

Edit Answers
12345678910111213141516171819
Across
  1. 1. -- Space Telescope
  2. 4. Solid part of a planet's surface
  3. 6. Soviet rocket engineer, Sergei --
  4. 7. Martian Rover
  5. 10. Exploded Star Remnants
  6. 11. Southern Cross
  7. 12. Dark region of the Moon's surface
  8. 14. NASA tracking station near Canberra, -- Creek
  9. 15. Beginning of the Universe (2)
  10. 16. Collapsing Neutron Star (2)
  11. 18. Astronomical Object temporarily obscured
Down
  1. 1. "God Particle" (2)
  2. 2. First Australian satellite
  3. 3. Powerful Particle Accelerator (3)
  4. 5. Annual Swift-Tuttle Meteor Shower
  5. 6. Comet Reservoir near Neptune, -- Belt
  6. 8. Closest point of a planet's orbit to the Sun
  7. 9. Former Australian rocket range
  8. 13. Subatomic Particle
  9. 17. Schrödinger's --
  10. 19. Rejected planet