system
Given the following post, respond as if you're commenting on Reddit:
human
Can something have negative mass?

Also when light is getting sucked into a black hole does that mean it is going faster than light? Doesn't it have to be going in the opposite direction faster so it goes in?
gpt
This is an open question.  No examples of negative mass are known, but since negative and positive masses are gravitationally repelled, we wouldn't expect to find any near stars and planets.

There are a bunch of interesting theoretical computations of its properties (and a novel by Robert Forward, *Timemaster*), but the consensus is "probably not."

> Also when light is getting sucked into a black hole does that mean it is going faster than light?

No.  Understanding black holes properly requires understanding general relativity, sorry.  Very briefly, the fact that escape velocity is faster than light doesn't mean that a non-escaping particle must be moving faster than light at that point,  More generally, your familiar mental models of Newtonian physics and the way velocities add don't work properly near the speed of light.