Tagged “Black holes”

3 articles

Gravitational waves and gravity waves: one word apart, nothing in common

A gravitational wave is a ripple in spacetime that needs no medium; a gravity wave is a mechanical oscillation of water or air that cannot exist without one. The two are routinely confused in translation.

2 min read3

Stars and Galaxies

White holes and wormholes: two solutions nobody has seen

They come out of the same equations as black holes, yet black holes have been photographed while these two have never been observed. Why they almost certainly do not exist in the visible universe.

3 min read3

Stars and Galaxies

Black holes: where the geometry of space collapses

Not cosmic vacuum cleaners but regions where spacetime curves so sharply no path leads out. From theory to the first image in 2019.

3 min read6