- After a long time after sunset, it takes the form of a black hole. Black hole is such a thing that is very large. In the 18th century, the scientists had given the signal of the existence of black holes, but the curtain took place from this mystery when in 1964 the first sign of Black Hole Kings X-1 was found. If we compress Mount Everest in less than 1 nanometer size then it will become a black hole. The blackhole's gravity is so high that due to its gravitational pull, the time runs slowly and stops altogether when it comes to thecenter of the black hole. The outer surface of the black hole is called event horizon, in whichone thing can not come back after entering once, even the light is not there.
Read next
From @ashokkumarsharma