system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 | What is the ‘event horizon’ as described by Stephen Hawking and what does it mean for time, space and light?

*Edit*

Thank you to everyone for the enlightening responses, I’ve learnt many many things and many have them have been in such clear terms that a giant idiot like myself has been able to understand.

The internet is excellent at times.
gpt
The closer you get to the centre of a black hole, the stronger it pulls, and the faster you need to move to escape that pull.

At some point the speed you need to escape its pull becomes greater than the speed of light. Because speed of light is the fastest speed anything can move with, nothing can escape it. This point is what's called event horizon.