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The Light Fantastic

The Light Fantastic        
Reid Southen (b. 1988)
Digital, unknown.

TARBOT: which planet would YOU want to live on?

CROE: it’s kind of hard to tell
i mean, we can only see the night side of the “small” one
i’d like to see it in full day-light before making any binding decisions, thank you very much

TARBOT: hehe
I wouldn’t be able to survive very long on the planet on the left
don’t know how to start fires
much less hunt / cook

CROE: but if you live on the green and blue planet, you get to stare at the pretty one with circles

TARBOT: the circles of light on that smaller planet *are* intriguing
don’t usually see such geometry expressed on Earth

CROE: i dunno, everyone always complains about traffic in the DC beltway
it’s kinda like I-95 around boston
but taken to extremes

TARBOT: :)

CROE: i wonder, do you think one planet would try to colonize the other?

TARBOT: not if they didn’t have space faring capabilities…

CROE: the one with the cities looks like an advanced civilization. maybe we’re witnessing a fleeting moment before they colonize the other

TARBOT: hmm, there is this alternate version

CROE: well then.
they seem close enough that they wouldn’t really be sustainable
wouldn’t they crash?

TARBOT: not sure
something I was thinking about
I wonder if there are other such planets, on the same ecliptical?

CROE: lol
“maybe the asteroid belt is an answer to your question”
that’s what happens when the two planets in the same orbit crash

TARBOT: hehe
it’s possible one is the moon of the other

CROE: yeah but the earth seen from the moon looks this small
….

TARBOT: yeah but both seen from space
….
the left planet looks big enough to be … big… enough. haha

CROE: there’s titan and saturn
titan is saturn’s moon, and it’s bigger than mercury or pluto

TARBOT: Roche Limit

CROE: the roche limit is cool. it’s based on the radius of the primary planet, and on the ratio of the densities between the two planets
the size of the second planet actually doesn’t matter
if we assume the densities are the same, then the distance is the radius*2^(1/3)
so 1.25*the radius

TARBOT: so that’s not so far

CROE: yeah
and i think that’s calculated from the center of the planets
seems like it could work, given the photo
that’s assuming rigid planets
i don’t know if i want to go into the liquid owe

TARBOT: :)

CROE: it does seem like there would be some pretty serious tide action going on
maybe that’s why the big one doesn’t have any cities
they keep getting washed out

TARBOT: hee
you’re awesome
I saw the Roche Limit article and went
“egads! all the mathses!”
and you were all like
“pffft, pwned.”

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