Gamma-Rays Spewed As a Black Hole Forms Might 'Reverse Time'

[Judi Lynn]

By Yasemin Saplakoglu, Staff Writer | August 23, 2018 02:41pm ET

As a massive star collapses into a black hole, it sends out a brilliant SOS signal in the form of ultrabright gamma-ray bursts. Now, scientists have found something very peculiar about those mysterious signals: They seem to reverse time.

Well, sort of.

A new study, published Aug. 13 in The Astrophysical Journal, has found that these gamma-ray bursts are time-reversed, meaning the brilliant light wave is spit out one way and then sent out again in the opposite order.

The researchers said they have no idea what's causing these time-reversed gamma-ray signals, but they added that the physics around black holes are so strange that nothing can be ruled out. [Supernova Photos: Great Images of Star Explosions]

Last gasps of dying stars
Gamma-ray bursts are some of the highest-energy explosions ever detected, shining brighter than a million trillion times the output of Earth's sun, according to NASA.

More:
https://www.livescience.com/63415-time-reversed-structures-gamma-ray-bursts.html

[marylandblue]

1. Captain, if we fly the Enterprise into a black hole, we can reverse time

and return to the moment before the ship blew up and achieve another ghost in the machine ending.

Make it so, Mr. Laforge.

[C_U_L8R]

2. If it can't undo elections

Then what’s the use?

[Jack-o-Lantern]

3. Very informative, thanks for posting.

[Judi Lynn]

4. It was a big surprise finding it. Thank you. n/t

[Permanut]

5. Stephen Hawking's idea about time..

He thought that in normal physics, even if the "Big Crunch" happened, that time would not reverse. That, as he put it, " the broken teacup on the floor would not put itself back together."

Incredibly fascinating stuff; thanks for posting!