Physics
Understanding Black Holes
Quick fact
The first black hole photographed, M87, is about 6.5 billion times the Sun's mass, and its shadow was captured in 2019 by the Event Horizon Telescope.
Why this is interesting
You know how a rocket needs an enormous speed to leave Earth? Now imagine an object so heavy that even light, the fastest thing in the universe, can't escape its grip. What would that mean for time and space?