PAC

3. A Jewish Scientist, a true polyglot, he may have tried to poison his professor once
6. part of the designation for the brightest star in a constellation
9. a favorite constellation in October
11. Wonder Boys of the Apollo 11 Flight Control Team, two young men whose ages combined to equal 50.
14. an organization that studies the intersection between space exploration and humanity
16. lingo for an astronomical tool
17. location of the Haystack radio telescope
20. Wonder Boys of the Apollo 11 Flight Control Team, two young men whose ages combined to equal 50

1. These high-energy particles originating from space constantly bombard Earth's atmosphere and can pose a threat to astronauts and spacecraft.
2. a nickname for one of the constellations depicting a female
4. an alkaline earth element used in special solar filters
5. though the neutrino was first postulated by Pauli, who was Italian physicist who put in on strong theoretical foundation
7. a word to describe a rogue comet
8. poet who partially solved Olbers’ paradox (first proposed by Kepler)
10. part of the constellation Argo Navis
12. a kind of light detector, especially for long wavelengths
13. American aerospace engineer whose advocacy for lunar orbit rendezvous (LOR) significantly influenced NASA's approach to landing astronauts on the Moon during the Apollo program.
15. a zodiac constellation
18. a demarcation or horizon in a black hole that on one side of it we have freedom to move in space but time inexorably moves on, whole on the other things are reversed–we have freedone to go anytime in time but are inexorably stuck in space
19. a space telescope
21. this is blue at high noon because of Rayleigh scattering