What if black holes,gamma ray birst, and other old billions of light year things are already dead? ?
There is no threat to out expansion.
- 3 weeks ago
Black holes are basically the corpses of very massive stars; the star lived, died, and exploded - the core was crushed down to the point of forming a black hole.
A Gamma Ray Burst is released during the star's collapse into a black hole or neutron star; they're usually focused into two beams that shoot out as the star is collapsing.
There are neutron stars, which are also corpses of very massive stars; the atoms have had electrons crushed into their nuclei during a supernova, leaving a mass of nothing but neutrons.
And, there are white dwarfs - which is the fate of our sun in the future - when a not-quite-so-massive star (like our sun) dies...
- CarolOklaNolaLv 73 weeks ago
They are already dead and have been for some time..The solar mass black holes may have completely evaporated and are gone. A
Light year is a unit of distance
- BillLv 73 weeks ago
Some of them probably are, but we can't know until the light, gamma rays or whatever stop reaching us.