Black holes

Precisely. If not less

Exactly.
It gets real interesting when one gets to learns new ideas about the universe.
Read up on Proxima Centauri, the nearest star neighbouring our solar system, and Breakthrough Starshot, a proposal to use light sails carrying probes to reach Proxima Centauri (4.37 light years away)

I just read on this. A very interesting read

I always tell people that the cutting edge technology. not yet available anywhere else is in NASA. I watched the Perseverance rover landing on Mars with that parachute and a sky crane and it was like “what the fuck” is this science fiction?

Exactly