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Joined 3 years ago
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Cake day: June 10th, 2023

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  • Pretty good summary. I’ll add a couple corrections:

    This usually involves liquid oxygen. That’s heavy and under pressure

    The critical point of oxygen is below room temperature, meaning it is not possible to keep oxygen liquid using pressure alone. For rockets, liquid oxygen is typically loaded within hours or minutes prior to launch, before it has a chance to warm up and boil off.

    winning solution that could escape earth’s gravity well was the Falcon 9. A multi-stage rocket with different fuels for different stages

    Falcon 9 is a two-stage rocket, but it uses the same propellants (kerosene and liquid oxygen) on both stages.

    Also, I’m not sure if I would call the Falcon 9 the winning solution, just the “winningest” solution so far. SpaceX’s Starship, Stoke Space’s Nova, and any of the upcoming Falcon 9 clones have the potential to improve on the Falcon 9 design or solve the challenge of reusability in slightly different ways.