HN user
like if john aaron had adhd and played tuba
you can’t see the majority of starlinks with the naked eye, what you’re seeing is either some other constellation or freshly launches starlinks that are still orbit raising. once starlinks are at altitude they actively manage their reflection angles to avoid bouncing light back at earth
Had to stay up until 2am shutting down our spacecraft. Stupid sun hates to see me get a solid night’s sleep.
My ex coworkers at spacex are pretty damn motivated to get to mars, many of them despite all the Musking happening. I wouldn’t bet against them.
Yeah I’ve wanted to build this for ages (and have tried a couple times). The use case is festivals/sporting events and other places where permanent infrastructure doesn’t really exist. The hard part is keeping messages small if you wanna include any of the token tech you’re talking about - probably, a system where your payment for usage is that you be an active relay node is more effective. Something something trust models, ala existing cert signing models.
Its best for places like football games or festivals, where the traditional network gets overrun
Wild. I was in my 4th/5th years of college during the pandemic and had an internship writing mission planning tooling for lucy. Felt like either two weeks or ten years, coding on the couch while we were pretty sure the world was ending outside. Bizarre times.
Don’t do this, it makes it a huge pain to test bar().
When you write the initial code to figure out bar, just throw that code in a unit test so you can run it any time. Stop throwing tests away!
The target market is the same as normal mining, you probably mine platinum. The cost probably only closes with either starship or mining fuel in space.
In what languages is n % 2 -1 for negative odd numbers?
Edit: apparently JS, java, and C all do this. That’s horrifying
An algorithm is “a process or set of rules to be followed in calculations or other problem-solving operations, especially by a computer”
How does a giant pile of linear algebra not meet that definition?
If you had spacex’s budget you could make all of these things happen
The audiobooks are pretty well narrated too, great for anyone who needs 160 hours of audio
Musk owns 79% of voting shares of spacex (but yes, only 42% of equity). I guess it depends on your definition of “owns”, but its not unreasonable to say he owns spacex.
What? Carbonaceous chondrites (the toyota corolla of asteroids) are like .1ppm gold, whereas Earth’s crust is ~0.005ppm
It wouldn’t surprise me at all if early heat seeking missiles used just a PID controller, since a big part of what makes PID attractive is the ability to implement it with electrical components. Take a pair of IR photodiodes and wire them such that their difference is the error of your PID control, wire the output of the PID to the steering on your missile, and suddenly you have a missile that points at the nearest IR target (on one axis of course).
Modern missiles do better than this, but a missile wired this way with a proximity fuse would hit the target a reasonable amount of the time. Not silly at all if you haven’t invented microcontrollers yet.
I’d just prefer the survival rate not drop to zero for everyone at the same time.
They can be used as a single person genderless pronoun.
The idea is that, because of the risk of a technological explosion, any sentient species is a threat.
I don’t really buy the idea though - cooperation has been the strongest strength of humanity and is one of our greatest evolutionary edges. Why wouldn’t that apply on the interstellar scale too?
This is the biggest storm since 2003! We hit a G5 on the SWPC geomagnetic storm reading, and my team had to power down components on our satellites to keep them safe!
There isn’t really a “why”, other than the need to match observed reality.
We know from observations that light moves at a constant speed, even when the observer is moving near the speed of light, and we know that this observation is true regardless of your frame of reference.
In order for physics to remain consistent while accounting for the constant speed of light, other things need to flex between the two reference frames: namely, time (time dilation) and length (Lorentz contraction).
Relevant xkcd http://xkcd.com/1217
I can’t remember the last time I saw someone talk about the Gauss-Bonnet theorem without talking about soccer balls
Hey
I think you’ve misunderstood the personality of hackers if you think they would make chips play sounds via radio because it was useful
Oh wow, I make those too using a similar technique:
https://tim.fish/assets/images/omni/drip.png https://tim.fish/assets/images/omni/splut.png
The code is here if you’re in the mood to be morbidly fascinated by my hacky python https://github.com/TimEwing/omni
Worth noting mine are only 7-bit instead of 8-bit because my poor little lenovo kept running out of ram and crashing.
What’s your math on $15/MWh? As far as I can tell, the steam turbine is a pretty insignificant part of the price of coal energy generation
The foot is defined as exactly 0.3048 meters, does that mean it’s an SI unit?
I do hate when f holes are too short and fat, but yes: understanding the parts you generally ignore might help.
Car + Darth Vader = Carth Vader
“People underestimate how nasty America is. We’d be better off building colonies in the Sahara than in America.”
Radiation on the surface of mars is only ~2.5x the radiation in the ISS. There’s no air there, either. Perchlorates suck for humans but are great as rocket fuel - there’s a double incentive to strip them out of the soil, and there are known mechanisms for doing so. The low gravity may or may not be an issue, but people have survived a year on the ISS in 0G so it’s probably surmountable.
Yes, living on Mars is much, much harder than living on Earth. No, it isn’t impossible.