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Mermaids -- *... total geek*
... I just spent about four hours running all over Wikipedia and bugging ![[livejournal.com profile]](https://www.dreamwidth.org/img/external/lj-userinfo.gif)
joisbishmyoga for the pleasure of doing that. And it's still too simplistic to give me a working calendar re: eclipses.
It's the last time I decide on a planetary system with THREE moons. Last time.
Basically, it helps me keep track of which moons can possibly rise together in the same sky and which moons just should not. For example I'm never gonna have three full moons side by side. Or a triple-eclipse. (I could have aligned them in a way that makes that possible, but then the system would collapse.)
(While the Huntress does one complete revolution around the planet, the Matron does two, and the Girl-child does four.)
... Oh hell, just look at this here animation, stolen from Wikipedia.
I think the Girl-Child -- the inner moon -- isn't actually spherical. Because she's supposed to be the most erratic one, but if she's on the inside that's getting way too complicated. And I wanted the Matron to be the biggest moon -- or to look the biggest at least -- but I'm not too sure she can do that and still be in the middle. So many things I don't know about astronomy. @__@
joisbishmyoga: Wait, no. You could arrange the orbits so that the huntress' crosses the inner moons' orbits at points where the resonance means they're out of the way. And if the orbit is also tilted the right way, the huntress moon solar eclipses would only be visible in the temperate zone where the mermaids can't live.
askerian: AUUUGH
joisbishmyoga: So you'd only get occasional lunar eclipses, when the planet blocks sunlight and the huntress moon turns red.
JoIsBishMyoga: Which would be AWESOME.
askerian: *__*
joisbishmyoga: Girl-child, matron, huntress, with the huntress tilted and the highest-lowest points of the orbit on the noon-midnight sides of the planet, and the sunset-sunrise line at the huntress' quarters. So the huntress would cross the inners' orbits when they're at full or new, a quarter-circle away from the huntress and unable to eclipse her.
joisbishmyoga: http://en.wikipedia.org/wiki/Image:TheLaplaceResonance2.png
joisbishmyoga: btw, if the angle's strong enough, you might never get a perfect new huntress. she'd have a thin crescent parallel to the horizon.
... And now, a map! :D damn it what's the liveable depth of the sea. auuuugh.
joisbishmyoga for the pleasure of doing that. And it's still too simplistic to give me a working calendar re: eclipses. It's the last time I decide on a planetary system with THREE moons. Last time.
Basically, it helps me keep track of which moons can possibly rise together in the same sky and which moons just should not. For example I'm never gonna have three full moons side by side. Or a triple-eclipse. (I could have aligned them in a way that makes that possible, but then the system would collapse.)
(While the Huntress does one complete revolution around the planet, the Matron does two, and the Girl-child does four.)
... Oh hell, just look at this here animation, stolen from Wikipedia.
I think the Girl-Child -- the inner moon -- isn't actually spherical. Because she's supposed to be the most erratic one, but if she's on the inside that's getting way too complicated. And I wanted the Matron to be the biggest moon -- or to look the biggest at least -- but I'm not too sure she can do that and still be in the middle. So many things I don't know about astronomy. @__@
joisbishmyoga: Wait, no. You could arrange the orbits so that the huntress' crosses the inner moons' orbits at points where the resonance means they're out of the way. And if the orbit is also tilted the right way, the huntress moon solar eclipses would only be visible in the temperate zone where the mermaids can't live.askerian: AUUUGHjoisbishmyoga: So you'd only get occasional lunar eclipses, when the planet blocks sunlight and the huntress moon turns red.JoIsBishMyoga: Which would be AWESOME.
askerian: *__*joisbishmyoga: Girl-child, matron, huntress, with the huntress tilted and the highest-lowest points of the orbit on the noon-midnight sides of the planet, and the sunset-sunrise line at the huntress' quarters. So the huntress would cross the inners' orbits when they're at full or new, a quarter-circle away from the huntress and unable to eclipse her.joisbishmyoga: http://en.wikipedia.org/wiki/Image:TheLaplaceResonance2.png
joisbishmyoga: btw, if the angle's strong enough, you might never get a perfect new huntress. she'd have a thin crescent parallel to the horizon.... And now, a map! :D damn it what's the liveable depth of the sea. auuuugh.