Q: Define the term Black Hole. What’s expected inside it?
(CSS Paper 2007, 2018)
Black Hole:
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. They are invisible. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently than other stars.
This soon may change. An audacious global project called the Event Horizon Telescope is currently working to piece together an image of a black hole for the first time. And if it does, it will be a remarkable accomplishment. Because as massive black holes are, they’re actually incredibly hard to see up close.