Black Holes
In space there are stars in which gravity is so strong that nothing can escape from it—not even light. We call these stars black holes. The gravity of black holes is so strong that it pulls in nearby stars, drawing them towards it.
Astronomers believe that a black hole forms when a massive star runs out of energy and is crushed by its own gravity. A star that runs out of energy collapses and then explodes. The exploding star throws off its outer layers, but the remaining core continues to collapse and becomes a black hole.
Because black holes are invisible, they are hard for scientists to find. However, most astronomers believe our galaxy contains millions of them. Astronomers have found strong evidence for many black holes in our galaxy and in nearby galaxies.
Picture Credit : Google
