A virtual black hole is a computer simulation of what would happen if there was a real black hole in outer space. A black hole is an area in space where gravity is so strong that not even light can escape. In a virtual black hole, scientists use mathematical equations to try to understand how things like gravity, space, and time might be affected if there was an actual black hole nearby. It's like a computer game that lets you explore what might happen in the real world if a giant black hole was right there.