Question: Have you ever seen a black hole? What are they made of?

Vicky Fawcett answered on 20 Mar 2023:

We’ve seen black holes through telescopes! The first ever “image” of a black hole was taken by radio telescopes in 2019.
Black holes are formed when massive stars (about 25 times more massive than our sun) die and collapse into a small point. However, we don’t know what is inside a black hole because the gravity is so strong that nothing can escape. So even if we sent a robot or rocket into a black hole, it would not be able to escape to tell us what is inside.