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Joined 9 months ago
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Cake day: September 27th, 2023

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  • You’re not wrong, so I think that a truly Universal UTC would have to include an observation point as a reference timeframe. (Side note: I realize the following is probably WAY too much overthinking, but I got into it and couldn’t stop. Also, for most practical purposes, probably any of these that involve Earth are going to be effectively equivalent. Also also, maybe for any practical purposes, these are going to be unnecessary because the most relevant form of timekeeping is going to be local time wherever you are, so a “universal” reference timeframe is probably unnecessary.)

    So anyway, if our UUTC is going to include a universal reference timeframe, we might as well just use the existing UTC and call that observation point “the point where the Prime Meridian, the Equator, and Mean Sea Level meet on the planet Earth.” The 0-0-0 point on Earth’s surface, so to speak.

    Yeah, that point spirals around the sun like a five-year-old ballerina, so maybe we’d want something with a little less movement? But pretty much anything with enough stability to be a good reference point would also have enough gravity that time would move significantly quicker near it, making it dramatically different from the universal average, so maybe that’s not a whole lot better.

    I guess we could pick a point along the Earth’s orbit and use that 0-0-0 point on its surface at a specific time of year as that reference point? Say, January 1? But then we’re using time as a factor in the standard definition of time, so that wouldn’t work.

    Maybe we just use Earth’s apogee or perigee from the sun, and call the reference point “the location, relative to Sol, of the 0-0-0 point on Earth when the Earth is at its apogee”? But Earth’s orbit and its rotation aren’t synced up; it completes an orbit every 365.256 rotations–that’s why we have Leap Year–meaning that the point would be changing by about a quarter of the circumference of the Earth every year, then snapping back again every fourth year. I guess you could average it, but then it would be somewhere else on Earth’s surface.

    We could abandon the 0-0-0 point and just call the reference frame “the point at Earth sea level which is furthest from the sun during aphelion,” but then the actual location would change every year. Plus, the problem with using Earth as the measuring stick at all is that Earth’s orbit wobbles, and can be affected by other orbiting bodies in a seemingly non-deterministic fashion (the three-body problem), and it’s moving away from the sun.

    So we could disconnect the reference frame from the actual orbit of the Earth, idealize it, and update it every few years: average out the exact location of Earth sea level furthest from the sun during aphelion over X years of recorded orbital history and Y years of predicted future orbits, and call that averaged location the reference point. Then go back and update it annually as orbital dynamics change and get better.

    I think that might be my best (or least-worst) idea for that sort of thing, unless someone can figure out a way to get something out of the CMBR that’s easily measurable and can define a location non-subjectively. Well, subjective to the CMBR, at least.











  • I don’t know that I agree. Or rather, I agree, but come to the opposite conclusion.

    I think that as we take our first steps into the broader universe, we have to consider the ethics and morality that we’re stepping out with. If we choose people based on (let’s face it) arbitrary genetic variation, independent of their ability to perform the tasks assigned or their representative value to the human race as a whole, that means that as we plant our flag on the Martian soil, we’ll be taking eugenics with us.

    The minimum viable population of a species is about 50. In order to prevent genetic drift over time you need closer to 500, but we’re sapient; we can implement genetic therapies when needed to help maintain allele frequency while the population is growing. And, in reality, operating a long-term Martian colony is probably going to need more than 50 people anyway; a recent NASA study suggested 25 would be enough, but previous research said 100+ would be necessary.

    And keep in mind, an actual Martian colony doesn’t have to be self-sustaining in a complete vacuum (ha) for centuries. It will probably be only a generation or two before regular travel between the two planets will be possible. Plus, if we build and maintain a lunar colony first, the initial population of a Martian colony can be much larger.

    In short, I think I’d rather work harder and send more people so that we can ensure we’re maintaining our values, than allow such a retrograde idea as eugenics to poison our first venture toward being a multi-planet species.






  • I’ve been getting back on the RSS train in the past year or two, after dropping off when I started getting all of my news on Twitter. After that was proven to be a terrible idea, I discovered that my Feedly account was still there waiting for me. I’ll be self-hosting something else soon, but my post-Twitter, federated, RSS-driven media consumption has so far given me a lot more control.