Black Holes

1. "As we observe an object approach a source of gravity, we observe its rate of pass of time to"
3. The minimum stable orbital distance from a 4 solar mass black hole (2 words)
4. "As the velocity of an object approaches the speed of light, its mass appears to"
6. These distort the shapes of objects as they approach a black hole (2 words)
7. The only thing in the Universe which is not relative (3 words)
9. The principle that demonstrates that the effects of gravity and accelerated motion are identical
12. This law protects us from the unpredictable properties of singularities (2 words)
15. A place surrounding a rotating black hole where it is impossible to be still
17. The type of redshift observed when a photon escapes from a massive object
18. horizon "The ""surface"" of a black hole"
19. The type of star at the location of Cygnus X-1
20. The theory of relativity which is NOT a theory of gravity
21. If we could observe an object traveling at the speed of light we would measure its length along the direction of motion to be
23. The number of dimensions in Einstein's General Theory of Relativity
26. Where do the X-rays originate from in Cygnus X-1? (2 words)

2. "At the end of fusion, the core of a very high mass star is too massive to form one of these (2 words)"
4. The I in LIGO
5. If you look at the light from stars close to the event horizon of a black hole you will see this (2 words)
8. Light follows this property of spacetime around a massive object
10. The charge on a black hole which attracts an electron
11. Ripples in spacetime
13. A tunnel through hyperspace between two distant parts of the Universe
14. Objects with high escape velocities have high
16. The radius of a 5 solar mass black hole in kilometers
22. Newton's theory of gravity cannot explain the existence of black holes because light has no
24. The star at the location of Cygnus X-1 emits which kind of radiation most strongly?
25. At the center of a black hole