**Ask a monkey a physics question thread**

[MadMojoMonkey]

It's called dark 'cause dark matter doesn't interact with light.

If it blocked light, then that would be an interaction.

Dark matter is invisible, not opaque.

[oskar]

It's called dark 'cause dark matter doesn't interact with light.

If it blocked light, then that would be an interaction.

Dark matter is invisible, not opaque.

Whoops. My mistake. Or really their mistake for calling it dark. supid astrophysicist.