Video: Top 5 biggest black holes discovered by NASA in 2017

A black hole (black hole or black hole) is an area in space-time that gravitational fields prevent everything, including light, cannot escape.

The black hole is called "black" because it absorbs all radiation and sucked matter through the event horizon.

The black hole is called "black" because it absorbs all radiation and matter sucked through the event horizon, like an absolute black object in thermodynamics; it is also not a kind of "hole" or "hole" but an area of ​​spacetime that does not allow anything to escape.

Below is a summary of the five largest black holes discovered by NASA over the past year, please see.