Latest about Expert Voices - Paul Sutter
What happens at the center of a black hole?
At the center of a black hole, matter is compressed down to an infinitely tiny point, and all conceptions of time and space completely break down.
Distant alien planets could be turned into dark matter detectors
A pair of astronomers is advocating a daring new research program: to turn our widening search for life beyond Earth into a hunt for dark matter.
Black holes could become massive particle accelerators
Physicists suggest harnessing the gravitational pull of black holes to create ferocious particle accelerators. The trick? Carefully set everything up so the particles don't get lost forever.
A mini fractal universe may lie inside charged black holes (if they exist)
In one upside-down, hypothetical version of the universe, a bizarre type of black hole could exist that is stranger than an M.C. Escher sketch: charged black holes.
Black holes so big we don't know how they form could be hiding in the universe
Black holes can get big … really big. But just how big? It's possible they could top out at over a trillion times more massive than the sun.
Black hole 'hair' could be detected using ripples in space-time
Hair may record the information swallowed by the gravitational monsters.
Could the universe collapse into a singularity? New study explains how.
All you need is some string.
Does Planet Nine really exist?
For the past few years, the possibility of a new (and big!) planet hanging around in the far outer solar system has tantalized scientists and the public alike. Is "Planet Nine" out there or not?
