According to Wikipedia: <a href="https://en.wikipedia.org/wiki/SpaceX_Starship_(spacecraft)" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/SpaceX_Starship_(spacecraft)</a><p><pre><code> Launch mass: 1320 tons (120 tons dry)
Payload capacity: 100 - 150t (fully reusable)[1] 250 - 300t (expendable)[2]
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So, to fully fuel up a Starship on LEO 1200 tons of fuel are needed, which are between 8 and 12 full payloads of said Starship.<p>Yes there could be some boil-off.<p>Refueling station could be protected both by Sun screens (a-la JWST if you wish) and include active coolers. This is an old topic in space technology, e.g. both Buran (30 days of orbital flight while keeping LOX liquid onboard) and Vulcan's second stage (LH2 onboard) focused to an extent on that.<p>We do have a long history of refueling - since at least station Mir the visiting Progresses used to refuel the station, only the liquids were different, and of course the amounts were very different. Still this increases hopes that we can develop the refueling technology since we'll soon need more of it.<p>Those multiple launches don't necessarily spell doom to the lunar plans for Starship. For example, Falcon-9 is reliable enough to have a hundred consecutive successful flights. And even in 1960-s the idea to have multiple launch pads to be able to launch even after catastrophic event on one of them wasn't too radical. And majority of activity of this kind is probably going to be unmanned, which makes things faster and cheaper to repeat if something goes wrong.