• 0 Posts
  • 542 Comments
Joined 3 years ago
cake
Cake day: June 4th, 2023

help-circle
  • Ceres would be a way better start. Lots of water for shielding, consumption, and fuel; easy access to asteroid orbits; and a shallow gravity well to make transport easy.

    Similarly, many of the icy moons around the gas giants would be good, also with decent mining, but better science opportunities too!

    Our Moon is good too. Close, big enough to not need zero gravity setups. That’s actually about it really, it’s just right here. May as well do Orbit I guess.

    Start with Antarctica and the ocean floor. That’s still 80% as difficult, and rescue can take 30 minutes, not 3 days or 10 months!



  • 1kg of oxygen is a good estimate, humand need 0.5-1kg per day.

    Astronaut calorie budges is a bit higher than average, as would be for labouring humans. About 3000kcal, or 12 MJ.

    I think more important than the raw energy and oxygen is sourcing the water, cleaning the water, producing the energy to electrolyse and heat, and maintaining the equipment necessary to do so. And that’s assuming all food is shipped in.



  • If the language makes common but dofficult to deal with error impossible, that’s nice. Not critical, but nice.

    If the language introduces easy to make and hard to deal with errors, that’s an issue. Not a deal breaker, but an issue.

    The idea does exist, but it’s stated with way more confidence and finality than it deserves. That’s social media I guess.







  • LEDs are so efficient that even microamps can power them. If your LED driver is cheap, it’ll run on basically nothing, or charge up enough to start for a fraction of a second.

    The microamps come from a hot wire running next to a switched wire behaving as a capacitor when carrying AC voltage, letting microamps leak through. (It’s not required that the light is on the hot side of the switch as I said previously, my bad).

    This can happen if the switch box is a terminal box with hot and switched wires in the same cable, which is rather common. Probably some other configurations too.


  • Honestly, I “upgraded” my phone to the 8 year newer model, and besides the easy numbers like CPU speed, RAM, and storage, it’s a straight downgrade. No headphone jack, slower charging, 50% chance of worse battery life (something slurps like mad sometimes), a hole in the screen, fewer buttons, a bunch of my apps don’t work anymore, fewer sensors, worse case selection, fatter & heavier, and the big G won’t stop pestering me to install malware.

    I still use my old mobile more. It really just needs a new battery and some extra RAM.








  • The Sol-Jupiter system would have a bary center just 7% outside the surface of Sol. The effect of all the Gas Giants together can either center the syster in Sol’s core or move the barycenter 120% outside Sol.

    The really weird thing is that the part of stars outside the core is more like an atmosphere. If the star gets hotter, the parts outside the core can expand. This is happening slowly as Sol’s core fills up with Helium and becomes denser, which fuses Hydrogen faster. So despite weighing less, the Sol-Jupiter barycenter will be engulfed within Sol’s envelope. Once Sol stops fusing Hydrogen in it’s core, the core will shrink and heat up, fusing Hydrogen in a shell around the core, which will cause the envelope to grow and engulf Venus and possibly Earth directly, and definitely contain the full system’s barycenter. After that it will release a bunch of mass in a planetary nebula, which will cause it to shrink a lot, and the remaining planets will probably orbit much farther out, which would throw the barycenter waaaayyyyyy outside of the white dwarf left over.