SOLAR SYSTEM

UNIVERSE

ASTEROIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What describes a black hole?
A
shells that are cast away from a low-mass star
B
attracts all matter and energy that come nearby
C
a low-mass star that has shed its outer layers
D
a heavy star that expands and gives off large amounts of light
Explanation: 

Detailed explanation-1: -When matter falls into or comes closer than the event horizon of a black hole, it becomes isolated from the rest of space-time. It can never leave that region. For all practical purposes the matter has disappeared from the universe.

Detailed explanation-2: -Hawking radiation is theoretical black body radiation that is theorized to be released outside a black hole’s event horizon because of relativistic quantum effects. It is named after the physicist Stephen Hawking, who developed a theoretical argument for its existence in 1974.

Detailed explanation-3: -Black holes have two parts. There is the event horizon, which you can think of as the surface, though it’s simply the point where the gravity gets too strong for anything to escape. And then, at the center, is the singularity. That’s the word we use to describe a point that is infinitely small and infinitely dense.

Detailed explanation-4: -A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying. Because no light can get out, people can’t see black holes.

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