• 0 Posts
  • 26 Comments
Joined 1 year ago
cake
Cake day: July 1st, 2023

help-circle




  • It’s a real shame that they never got to install the centrifuge module on the Iss. It was supposed to be big enough for a person to fit in, and would spin to simulate gravity. The best way to mitigate damage is to remove the thing that’s damaging you. We don’t test how to survive radiation exposure by having people stand next to some plutonium and see how many jumping jacks stop them from getting cancer. We have protocols about how long you can be around radiation, and how fast you need to leave the area. Microgravity would be treated the same way: how long until it starts affecting your health, and what’s the minimum amount of rotational artificial gravity needed to stave off the effects.


  • Before Apollo 11, nasa spent a lot of time getting astronauts to try to navigate to a simulated lander out in the desert. They used explosives to make a scale version of a lunar field, dropped astronauts off, and had them try to navigate to the lander.

    If I remember right, only a couple people were able to even identify where they were on the map, let alone find the lander again. Lunar surfaces are just so unnatural that human instincts about size and scale tend to get you in more trouble than not.



  • You’re comparing a fully finished rocket development program to a half developed rocket.

    SLS already did its first flight almost 2 years ago. It successfully delivered a fully functional crew capsule to earth orbit, and that capsule successfully flew around the moon and returned to earth. It was a fully functional rocket that completed all of its mission objectives.

    Starship has not delivered itself to any orbit, let alone any useful systems. Flight 3 was “mostly successful” in the same way a crash landing is a landing. The stated goal was a suborbital flight to test booster return, the Pez door(something they are not contracted to develop), in flight fuel transfer, and Ship re-entry.

    Starship managed to reach a suborbital altitude and speed. The booster separated and started its return, which ended in it slamming into the ocean at fighter jet speeds. The Pez door got jammed open after its first test, they just didn’t do the fuel transfer test(moving some fuel from a header tank to the main tank) and the ship was out of control and couldn’t be oriented for re-entry. It entered the atmosphere with its heat tiles facing sideways to the atmosphere and promptly disintegrated.

    They failed more than half the goals of the flight. Basically everything after stage separation was a failure, and I don’t put much stock in the corporate spin of “everything after cleaning the pad is icing on the cake”

    We’re not even talking about the fact that a fully fueled ship that’s supposed to take 100 tons to orbit is incapable of getting itself to orbit. Or that Elon recently announced Starship 2, which is going to be bigger and can take 150 tons to orbit. Starship 2 was not on the development timeline for Artemis.

    If Starship ever makes it to orbit, I have no doubt that it will cost just as much as SLS to develop and launch.


  • Not gonna matter if they don’t pull the plug on starship being the lunar lander.

    They were supposed to do an unmanned lunar landing with the thing earlier this year. Currently it has failed to deliver itself to any orbit, let alone demonstrate the ability to refuel in orbit and reach the moon.

    And that’s with empty test articles, no life support equipment, food, water, or anything else the crew is going to need.

    Starship is at best, years behind schedule, and at worst, an outright snake oil scheme designed to defraud American Taxpayers.





  • At this point we’re not even sure if fully autonomous vehicles are possible.

    Yes that one guy has been saying it’ll be ready next year for the passed 10 years, but no self driving company has been able to get an autonomous car from point A to point B in all road conditions that a competent human can manage.

    Even aircraft autopilot is not as autonomous as what people want out of self driving cars. Pilots are still required to be at their seats the entire flight in case something unexpected happens. And there are a lot more unexpected things on a road than in the middle of the sky. Even discounting human drivers being in the way, a self driving car needs to be able to recognize everything a human can and react to it better than a human would. I’m not sure that’s possible, even with “AI”. The human brain is insanely good at pattern matching, and it took millions of years of trial and error evolution to luck our way into that. How can someone guarantee an AI is going to be better?







  • There’s plenty of cases where they don’t look for cars either.

    Or the cops themselves just straight up steal the car themselves.

    My wife’s car was ordered to be towed by, according to the impound lot, the police.

    Neat thing was that there was no ticket with the car, no police station within 3 miles had a record of a ticket for her or the car, and the area she had parked had no signs that suggested it was illegal to park where she did, nor does the city have any ordinance about overnight parking.

    Best we can figure, is a cop or the tow company that works with the city, just decided to tow a car for funsies and the 500 bucks it took to get it out of impound.

    The police and every organization associated with them are corrupt to the core.


  • Zron@lemmy.worldtoScience Memes@mander.xyzcannot unhear
    link
    fedilink
    English
    arrow-up
    3
    arrow-down
    1
    ·
    9 months ago

    Aluminum was the original spelling, adding an extra I was a British thing so aluminum can match the pronunciation of other elements like helium, lithium, beryllium, uranium, and plutonium.

    Why didn’t you guys change iron to ironium? Or hydrogen to hydrogenium? Tungsten to tungstenium? Lead to leadium?

    It doesn’t make any sense to change one element name when there are plenty of other elements that don’t match the naming scheme.