[snek_case]

You could also just put a ballistic missile on a satellite, then you'd have a guidance system.

[vl]

Any warhead needs guidance system. The question is if passive kinetic payload is enough or it should be something with explosives.

[bloopernova]

Or a GPS guided bomb. Just fire it from a small rocket and let gravity do its thing.

[vl]

It needs to re-enter, i.e. have the thermal shield, etc. This is what this Starship thing is all about - re-entry is really hard. Regular guide bomb is just going to burn or re-entry into atmosphere.