1.   So the paths of light rays in the event horizon had always to be moving parallel to, or away from, each other.

2.   The critical point, where gravity becomes so strong that escape is impossible, is called the event horizon.

3.   The epoch of blue shift is usually confined to the time when the object is still inside the event horizon.

4.   Anything, either matter or light, that brushes the event horizon is sucked inside by gravity, never to be seen again.

5.   Astronomers compared X-ray emissions from matter in the vicinities of six neutron stars, extremely compact objects without event horizons, with six candidate black holes.

6.   If the event horizon could be eliminated from a black hole, the singularity inside would be laid bare.

7.   Instead, everything ends in a spherical pileup just above the event horizon, frozen in time.

8.   Near the event horizon, space itself is believed to be twisted and swirled around in ways ordinary intuition cannot grasp, Thorne said.

9.   Shrouding the point, theoretically at least, is the event horizon.

10.   The Chandra observations appeared to confirm the reality of the event horizon by what was not seen.