/sci/ - Science & Math

Starship third stage ideas?

Can you fit a centaur inside starship?
And if you were designing a re-usable stage, would it be worthwhile to give it some kind of heatshield (maybe inflatable?) to allow for aerobraking on the earth return trip?
The overall rationale is that starship has a large drymass that limits it's deltaV especially with smaller payloads and makes it innefficient transporting small payloads.