Astro

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Across
  1. 2. the first gravitational waves were detected by the merger of a pair of what (5,5)
  2. 4. scientific term used for twinkling of stars(13)
  3. 8. the "sea of tranquility" can be found on which body in the solar system (4)
  4. 10. lightyear is a measure of what? (8)
  5. 12. outermost layer of the solar atmosphere (also means crown) (6)
  6. 13. most abundant element in the universe(8)
  7. 14. largest constellation (5)
Down
  1. 1. particle that interacts very rarely with matter (8)
  2. 3. upcoming space mission of India which will observe the Sun from L1 point (6)
  3. 5. a ball of ice and dust with a long, glowing tail (5)
  4. 6. the galaxy that is expected to collide with the Milky Way in 4-5 billion years (9)
  5. 7. what is the shape of Milkyway (6)
  6. 9. hottest planet in the solar system (5)
  7. 11. at one point the largest radio telescope in the world and featured in movies like Goldeneye and Contact (7)