Musk is talking about eventually having 1000 Starships ferrying people and materials to Mars every synod (every 26 months, when Earth and Mars are in...
They've also likely got a bunch of steel that was good enough for early prototypes or tanks, but not for for the prototypes they're building now. And...
Simplicity is valued when it results in reduced cost and improved reliability. The RS-68 is expensive, and look at recent experience trying to launch...
Ablatively cooled for cost reduction but still manages to cost $20+M/engine, pays the price of hydrogen fuel for performance which it then squanders...
"Right now, if NASA wants to return astronauts to the moon, the Space Launch System is the only game in town, even if it costs $2 billion per launch...
Not only do we not need them, we don't want big hydrogen boosters or cores, hydrogen just isn't a good fit to the problem. And SLS isn't even a good...
Salt deposits are extracted from weathering rock by water and concentrated in ancient sea and lake beds over many millions of years. Mars is covered...
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