[hinckley buzzard]

Because the laws of physics dictate that energy must be conserved, the rest of the star shot away from the black hole at enormous speed.

Now there is a development I'd not heard of before. Fascinating.

[neverdem]

Because the laws of physics dictate that energy must be conserved, the rest of the star shot away from the black hole at enormous speed.

"Now there is a development I'd not heard of before. Fascinating."

Erasmus wrote: What they meant anyway was that momentum is conserved.

I was going to write that too, but I was busy with a prior comment. In physics you always have conservation of energy and conservation of momentum. Even though there's no physical contact, think of recoil from a firearm when it's shot.