#stationery #school #electric pencil sharpener#black hole

What is the black hole?

Briefly put: it is a black sphere which can not escape even light.

How big is the black hole?

We use a Schwarzschild radius to describe. For example, a Sun's Schwarzschild radius is about 3 kilometers, so the diameter is about 6 kilometers. That means 1 million pieces sun is 6 million kilometers.

What does it mean to take a black hole photo?

It is the first time to confirm the existence of a black hole directly.

Why is this "flushing" photo so long?

On the one hand, because of the large amount of data,which involves the telescopes data of eight different places around the world;

On the other hand, there are some technical difficulties in the procedure of processing data.

What impact will this discovery have on humans?

In science aspect, for example, we are not clear how the diversion around the black hole produce

Is it like our 2 hole electric pencil sharpener's hole?