A black hole is a place in space where gravity is so strong that nothing, not even light, can escape from it. Imagine you are standing on the surface of a planet, and you throw a ball up into the air. The ball will fly up for a little while, but eventually it will fall back down to the ground because of the planet’s gravity. Now imagine you are standing on a black hole. If you threw the ball up into the air, it would fall back down, but it would keep falling and falling and never stop because the gravity is so strong. It would keep getting sucked into the black hole. Black holes are really interesting and mysterious objects, and scientists are still learning about them.