99.99999999999% cant get this good luck (you need it)

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Across
  1. 2. is this hard puzzle?
  2. 5. what is the population of Hawaii
  3. 6. you completed this with NO help WHATSOEVER
  4. 8. what is the most popular video on minecraft? [hint: song by captainsparklez]
  5. 11. what is brighter: a supernova seen as far as the sun is from earth or the detonation of a hydrogen bomb pressed against your eyeball?
  6. 13. owner of Roblox
  7. 14. really? bruh
  8. 15. what is the capital of Canada
  9. 16. atomic number 85; so radioactive scientists never saw what it looks like
  10. 18. o.5 nanosieverts x (one parsec/x [to the second power]) {hint: x= 0.00001118 parsecs= 2.3 AU}
Down
  1. 1. what engine runs the game ''Hello Neighbor''?
  2. 3. 3x+1
  3. 4. I don't have eyes, ears, nose and tongue but I can hear, see taste everything. What am I?
  4. 7. Greek god of Pluto
  5. 9. name the thing that starts with T ends with T and has T inside it
  6. 10. longer than 40 feet
  7. 12. dont even bother for this one
  8. 13. you CANNOT get this one correct
  9. 17. are these useless facts about supernovae (the plural of supernova) and stars?