Puzzle of the Day

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Across
  1. 1. luminous envelope of a star from which its light and heat radiate
  2. 3. an astronomical event that occurs when an astronomical object or spacecraft is temporarily obscured.
  3. 5. Technique to detect life on other planets
  4. 6. Spacecraft without crew
  5. 8. ESA's cloud and aerosol mission
  6. 9. what did the DG sign an agreement about in Munich last week
  7. 10. flying first on Ariane 6
  8. 12. are made of ice,co2 or methane mixed with dust
  9. 15. hottest planet in our solar system
  10. 17. stores genetic information and catalyses chemical reactions in primitive cells
  11. 18. name of a space telescope
  12. 20. who or what is Huginn from the Mogensen Mission?
Down
  1. 2. rate at which the Universe is expanding
  2. 4. one of the earliest sci-fi writers
  3. 7. organisation searching extraterrestrial life
  4. 11. first planet discovered with a telescope
  5. 13. planet on which it rains diamonds
  6. 14. something Mars and Noordwijk have in common
  7. 16. first mission to take a close look at a pristine comet that has never or rarely entered the inner Solar System before
  8. 19. Largest crater on the moon