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Cake day: October 6th, 2023

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  • Also note that 100km is the minimum height to be “in space”, not the minimum height for achieving orbit.

    That doesn’t really mean anything. You could achieve an orbit at a lower altitude if you wanted to, it would decay faster, but you could do it. The 100km karman line is an arbitrary thing, there is no solid line where on one side you can orbit and on the other side you can’t.

    Finally, I disagree with the note that having “enough fuel” to reach orbit means they have demonstrated such capability

    Well this seems like a bad semantic argument to me. I guess the question is, what does it mean to you to “demonstrate capability”. Like, for you, what would be the difference between demonstrating a capability to do something and actually doing that thing? How would those two things look different? Or in this specific case, how could they have demonstrated that capability without putting their rocket into a stable orbit (because it would be negligent to do that with this prototype rocket)?

    Given what they have done, is there any reason to doubt they could have gone a little bit further? And conversely, was there a good reason to stop where they were, or do you think they would have gone further if they could have?



  • As far as I understood it, SpaceX uses the word “orbit” liberally.

    No, that’s not really right at all. With this last flight they brought the starship above 200km (100km is generally considered the point at which you’re in space), so they definitely went much higher than they needed. In low earth orbit, the velocity needed to hold that orbit is about 28000 KM/H, they kept their velocity below 27000 KM/H for safety/responsibility reasons. That way, if something failed and they couldn’t relight their engines, it would naturally come down anyway in a predictable manner. The closer you get to actual orbital speeds, the less predictable the re-entry and impact location will be, so 27000 KM/H is really as high as you want to go if you want to ensure predictable re-entry. It looks like they maxed out at 26750 kmh.

    Also, after they reached 95% of orbital speeds, we know they still had lots of fuel in the tank because it had enough to slow down and land exactly where they wanted it to. And then… it still had enough to explode in a huge fireball, so clearly the rocket could have gone further. Or to look at it differently, all the propellant mass that got used up in that huge explosion at the end, that could have been payload mass. So clearly it has the capacity to put up a payload as well. I think the reason they haven’t yet is that mastering the reusability aspects are just a higher priority than the payload bays, I think we all trust they can design a payload bay when it comes time for that.





  • Yeah, it certainly could have been better. I believe the original plans were for both the booster and orbiter to essentially be planes able to land on a runway. It’s really a pretty awesome design, I mean can you imagine if we had a fully reusable launch vehicle in the 90s?

    But the truth is, the shuttle was never really reusable, it was more like… refurbishable. It took a lot of maintenance for the heat shield and the engines after every launch. It was also amazingly complex, there were so many possible failure states, and in many of those scenarios there was just no hope for the crew. With a shuttle and with the future starship, we’ll be seriously missing the launch escape system seen in traditional crew capsules. On some level, the last thing I would want would be to lose a whole shuttle crew and two booster pilots. (Though admittedly, these days the booster would certainly be unscrewed). I do also wonder, how much potential payload mass they’d lose by adding all the additional parts they would need to make the booster a landable aircraft.

    Anyway, it is possible NASA could do that again, but it would be a serious investment to get that working, and right now I think they just aren’t set up to take on a project of that complexity. Also, it would definitely distract and redirect funds from their ongoing science missions.

    So yeah, they could, it would be cool, but I don’t think it’s a good idea.


  • Indeed, NASA stopped launching rockets with the space shuttle. But that was the single best decision that NASA ever made. The space shuttle was an extremely expensive death trap. (It was damn cool, but a terrible way to get to space)

    It sounds concerning to put all the egg into the basket of private enterprises.

    You can blame the trump administration for that, with their commercial cargo and commercial crew programs. But the truth is, NASA has always heavily relied upon private companies, it’s just that in the past they were all defense contractors (Boeing, Northrop, lockheed, rocketdyne, ULA). The other annoying truth, these commercial programs have actually been wildly successful (except in the case of Boeing’s participation).

    But it’s been wildly successful in a few respects, one of which is that nasa has been able to focus on exploration again. Without having to support the huge costs of the shuttle program, they’ve been able to put a lot of their money into landers, interplanetary probes and space telescopes. I think we have more ongoing exploration missions than ever before. The Europa clipper mission launched just yesterday (on a SpaceX Rocket coincidentally). https://science.nasa.gov/mission/europa-clipper/







  • Cops are always hiding behind the same lame shield, “the officer fired in self defence”, “the suspect appeared to have a weapon”, “the officer fired when there was a credible threat to his life”…

    It’s all fucking bullshit. The officer fired because he was a big fucking pussy who was too afraid of black people to do his job, and instead killed an innocent he was supposed to protect.

    In war you have rules of engagement, generally it tends to include something like “don’t fire unless you’re fired upon”, as you don’t want to accidentally start a war. That seems like a sensible code to me, and I think it’s pretty crazy that we would say that to soldiers, but not police. A fighter pilot can track another aircraft, knowing full will that it is armed, and if they are not cleared to engage, they still manage to stand down every time. Perhaps police just need clearer rules. Don’t fire unless fired upon, or else it’s murder. That would be clear. Since apparently you can’t take the racist out of the cop, then we can at least take the decision making out of his hands.

    Firing because you see someone who might be armed… That’s just deportable, it’s criminally incompetent. I don’t care if you’re afraid for your life, if you were afraid for your life because you thought you saw a gun, quit the force. Today.





  • take the Artemis contract away from this idiot and SpaceX

    What? And give it to who? Besos? Boeing? China?

    I guess the only workable option would be to have the ESA do every Artemis launch. That could work, but it’ll likely cost 10 times more and take another 20 years.

    Also, the primary ways they save money is through reusable rockets and building everything in house. As far as I know, SpaceX isn’t skirting regulation more than any other launch provider. That said, I wouldn’t be surprised if they have a higher number of regulatory breaches than other providers, after all, they have a much higher number of launches than other providers.

    Don’t get me wrong Elon is a complete asshole, an addict, and at this point a detriment to society. But SpaceX is probably doing the most important work on the planet right now. Fully reusable rockets could usher in a whole new era of humanity. This could easily be just as transformative as the automobile.