[neolefty]

Nitpick: Can you actually hollow out an asteroid? It seems easier to use it to build an independently hollow structure.

Asteroids probably resemble piles of gravel -- maybe with ice mixed in -- more than chunks of stone or metal.

Update: Yes, this bugs me about The Expanse books. Spinning up Ceres to provide internal gravity ...

[TeMPOraL]

> Spinning up Ceres to provide internal gravity ...

Spinning a rock can be done over long periods of time. In The Expanse, it was a decades-long project, that earned the Tycho Corporation some serious engineering cred.

[lhopki01]

Spinning up asteroids can't be done. The speed you'd need for significant gravity would rip the asteroid apart.

[TeMPOraL]

[citation needed]

[imron]

> Nitpick: Can you actually hollow out an asteroid?

You'd probably need expertise in boring to pull it off ;-)

[bane]

It likely depends on the asteroid. They have very different compositions and densities.