P8.3 Beyond Earth

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Across
  1. 5. Natural satellite
  2. 6. Effect describing Earth's maintenance of temperature
  3. 7. Doppler change for a light source which is moving away
  4. 10. Ball of dust and ice in strongly elliptical orbit
  5. 11. Wave where the direction of energy transfer is perpendicular to the direction of oscillation
  6. 13. Wave where the direction of energy transfer is parallel to the direction of oscillation
  7. 18. CMBR
  8. 20. Star which has fused H and is getting bigger and cooler (2 words)
  9. 22. Star from which light cannot escape (2 words)
  10. 23. Astronomer who discovered expansion of Universe
Down
  1. 1. Theory of Universe evolution (2 words)
  2. 2. Object which is spherical (due to its own gravity) orbitting a star
  3. 3. Used to measure earthquakes
  4. 4. Star with exceptionally large density (2 words)
  5. 6. Orbit used for communications
  6. 8. Stellar explosion
  7. 9. Greenhouse gas (2 words)
  8. 12. Piece of rock found between Mars and Jupiter
  9. 14. Part of the life of a star where H fuses to He (2 words)
  10. 15. Very hot core of a star which is slowly going cold (2 words)
  11. 16. Cloud from a star which engulfs nearby planets (2 words)
  12. 17. Orbit used for Earth imaging
  13. 19. Massive star which has fused H and is getting bigger and cooler (2 words)
  14. 21. Scientist who related speed of object to wavelength of waves from it