• Member Since 21st Sep, 2011
  • offline last seen Oct 24th, 2016

Nordlichter


if you have become human enough to cry, then all the magic in the world cannot change you back

More Blog Posts41

  • 401 weeks
    Carne Diem

    Yooo, what's the deal with this apparent dichotomy in fanfiction regarding ponies' reactions to carnivory? I don't know if it's a changing-of-the-guard in fanon, or if both "sides" are still present and active. The case is that I've seen a few authors these days writing their pony characters as being uncritical of meat-eaters and the eating/cooking of meat. Now, I'm okay with that viewpoint. But

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    7 comments · 354 views
  • 406 weeks
    On "Angel"

    So I was thinking a bit about Fluttershy's bunny Angel. Specifically, does his name mean that ponies have the concept of angels as we know them?

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    7 comments · 343 views
  • 409 weeks
    i'm super into scale now?

    so after seeing this pretty convincing chart a while ago, i've been passing a little time every now and then using its scale to determine the size of various features of equestria.
    suffice it to say, first and foremost, that satyrs are impossible.
    BUT! here's something i can share with you: a golden bit.

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    7 comments · 412 views
  • 430 weeks
    haven't yet seen it, but...

    so did the tree library go to the ethereal void, watch a clip show with treelestia and then get transformed into a winged elm?

    2 comments · 330 views
  • 434 weeks
    Here's a joke for you

    Why is it called Equestria Girls drama instead of the human canon brawl?

    2 comments · 293 views
Apr
22nd
2014

on physic · 11:51am Apr 22nd, 2014

you know what always bugs me is when people talk about eclipses happening in equestria. it's a geocentric system with the sun and moon diametrically opposed, right? they cannot eclipse - aside from that one time when they shared the sky due to screwy everfree magic kidnapping the princesses. so by extension, the sun and moon are likely the same size and orbit at the same altitude.
from where does the need for celestia and luna arise, then? i would posit they are needed to give the sun and moon boosts of force to let them continue / stabilize them in their orbits. this coincides with dawn and dusk over equestria, although it means that in other far-off places, the sun might tend to jerk forward a bit at noon, for example.
but when one mass orbits another in a 3+1-dimensional system, it needs no extra force to keep it going, yeah? we see that nowadays with our moon and with any number of geostationary satellites. (low earth orbit satellites need thrusters so the atmosphere doesn't drag them down.) so here, i posit that either one of the two following things may be true.
1: something about gravity is screwed up, say that inertial forces tend to outweigh (heh) the force of gravity for some inexplicable arcane reason.
2: there is some vacuum medium that causes drag and slows the sun and moon down. perhaps a magic background field, a pervasive thaumic medium of some sort? there's another word but it escapes me. essentially a luminiferous ether.

is there a finite speed of magic? i would think so, even just based on shown evidence, and it's nowhere close to light speed.

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Comments ( 3 )

There's a problem with that. If the sun and moon were always diametrically opposed, then the moon would always be full. Crescents are a big part of Luna's iconography.

2034516 Eh, I call it tradition. It wasn't always a geocentric system.
In any case, my ultimate point that I was trying to get to before my phone battery died, was this:
Due to relativity, a geocentric system where the Sun and Moon orbit the Earth is indistinguishable from a system where the Sun and Moon are still and the Earth rotates. The "jerk" of acceleration at sunrise would go the opposite way if you're in the Earth's frame of reference. I was just annoyed by people who say "Celestia is not really raising the sun, it's all a scam, she's just making the Earth rotate." The two scenarios are effectively identical, which makes the idea of a conspiracy pointless. What would be more focusable for a conspiracy is that in any set-up, the Sun and Moon would need additional force to keep moving at all. But I think that could be explained by some manner of ethereal magic gradient (THAT's the word!) that causes drag on matter.

2034911
So the sisters have to keep things moving because of the luminiferous aether?

Eh, makes as much sense as any other model of Equestria's cosmology.

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