A black hole is not, strictly, made of anything in the conventional sense. Black holes are so exotic that they defy commonsense ideas about matter. While an object such as Earth ca...
A black hole is a geometrically defined region of spacetime exhibiting such
strong gravitational effects that nothing—including particles and electromagnetic
A black hole is a place in space where gravity pulls so much that even light
cannot get out.
Y observes idealized clocks on X slowing down, freezing in time when X hits r
Y observes light from X redshift, reaching infinity at r
(thus X becomes invisible - yet somehow we can still see their clocks. The collapse would seem to slow down, actually freezing in time... More »
Oct 14, 2015 ... Don't let the name fool you: a black hole is anything but empty space. Rather, it is
a great amount of matter packed into a very small area - think ...
Apr 9, 2015 ... Black holes are some of the strangest and most mysterious objects in the
universe. Billions of them may exist in the Milky Way alone. But what ...
Black Holes: Gravity's Relentless Pull. Information, virtual journeys, and
simulations about black holes from the Space Telescope Science Institute.
Black holes are places where ordinary gravity has become so extreme that it
overwhelms all other forces in the Universe. Once inside, nothing can escape a ...
Astronomers think the object shown in this Chandra X-ray Observatory image (in
box) may be an elusive intermediate-mass black hole. Located about 32 million ...