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Joined 1 year ago
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Cake day: July 1st, 2023

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  • To orbit the moon, a space craft needs to move at about 1.5 km/s, or 3300 miles per hour.

    So any landing starts with you going at 1.5 km/s and needs to end at the moons surface when you reach about 0 meters per second.

    If anything goes wrong with your engines while you slow down, you smack into the moon at either near orbital speeds, or at fighter jet speeds. The window for having an engine failure and being slow enough to survive is so narrow that it might as well not exist.

    That’s why Apollo used pressure fed, self igniting engines. As long as 2 valves opened, you had an engine. And Apollo landers had a totally separate ascent engine that worked exactly the same way, so if the landing engine failed, they could just drop the landing stage and return to orbit at practically any time during the descent. They even had a whole procedure of what to do if the ascent engine didn’t light when they were supposed to leave. Everything from jump starting the engine like a car with a dead battery, to physically getting access to the valves and manually opening them.

    I hate the current plan for Artemis. I hate that in 55 years, we’ve only managed to make shit more complicated. The current plan is for a vehicle with no abort capability to ignite its 3 turbo pumped, liquid methane fueled engines at least 4 times to get from low earth orbit to the moons surface, with days between ignitions.

    A capability that has never been shown to work or even exist in any capacity. Turbo pumps are finally machined pieces of engineering that need to behave exactly right, or they turn a rocket into either a bomb, or a giant tube that can’t move. And the current plan for Artemis calls for these finely crafted pieces of machinery to be subjected to the harsh environment of both space where they’ll sit for at least a week, and multiple ignitions, where they’re subjected to ridiculous temperatures and pressures.

    Absolutely ridiculous. We never left an astronaut on the moon in the 60s and 70s, but by god are they trying to open the first graveyard on the moon these days.





  • I live right next to one of the largest airports in the world.

    I see 5-10 parallel lines in the sky multiple times a day.

    I also live next to one of the largest airports in the world, which is a few miles from a national guard base located right outside one of the largest cities in America.

    I’m probably in the fireball radius of a nuke, assuming the Russians haven’t been embezzling their government money and are still fueling their hydrogen bombs, so if the big red button gets pushed, I’ll just get vaporized about half an hour later.

    Don’t shoot yourself just because you see lines in the sky. You’re either close enough to civilization for planes to make lines in the sky, in which case the bombs will probably get you anyway, or you’re so far out in the sticks that you’ll have plenty of time to make a decision.


  • MIRVs have been a thing for like 50 years.

    The US even took them out of submarine launched missiles, because they made the soviets so nervous we had to promise that we couldn’t delete half of their country in 15 minutes.

    But don’t worry, nuclear war happens so fast, and diplomatic channels are so slow, if anyone launches anything, everyone is practically forced to launch everything or risk losing it. So even if Russia did just launch one to destroy 10-15 cities, all of the cities everywhere would be destroyed anyway.


  • Some of y’all aren’t training your dogs on food aggression and anxiety and it shows.

    Play with your dog’s food while it eats, don’t take it away, but move the bowl around and stick your fingers in the food. Get them used to you fucking with their food, and show them that nothing bad happens when their food gets touched. Especially if you have little kids or have little kids that come to your home with friends and family, your dog should be trained not to get anxious or aggressive about food. I’ve seen a lot of kids get scared by dogs because the dog is very defensive about food, but 5 minutes of training a day will knock that right out of them.









  • They likely have little idea of what being governable means.

    They’re an uncontacted tribe. All they know is some strange people showed up on their land and started wrecking the place.

    If some people showed up at your house, wearing strange clothes and speaking a language you don’t understand, started tearing down your walls and throwing out your food, wouldn’t you resort to some kind of violence to defend yourself and your home?

    This must be terrifying for them, especially because a lot of uncontacted tribes have oral histories about being forced out of their original lands by what we know to be mercenaries.