[why_at]

I think a big part of the motivation to have many launches within hours is because in order for Starship to deliver anything beyond low earth orbit it will need refueling by many other Starships acting as tankers.

This means that for one mission to the Moon for example you might need >10 Starships to launch, and it's better to have them closer together so that you don't have fuel in space being heated by the sun for days.

It remains to be seen if they will actually reuse a booster on the same day, but there is a use case for it.

[avmich]

> it's better to have them closer together so that you don't have fuel in space being heated by the sun for days.

A hydrogen stage for Soviet N-1 rocket was designed so that it would be used near the Moon. The shelf life was going to be about 11 days (I think astronautix.com has this datapoint).

Starship is bigger, and methane/LOX is hotter than liquid hydrogen. Will it be storable for a month?..

[avmich]

http://astronautix.com/n/n1blocksr.html

[HPsquared]

I wonder how much improvement a "sunshade" type thing could make in reducing boil-off.

EDIT: or even just orienting the heat shield itself towards the sun, it probably has a fair amount of insulation ability at normal temperatures too.