Re: Planets and Stars - an idea

:: Sorry, I should have written that the classification seems unfair.

: Brian Davis <brdavis@xxxxxxxx>
: I realize the situation can be made arbitrarily complex: it depends on
: the planet being spherical, rotating, orbiting, low eccentricity,
: obliquity, fusion as an energy source, and of course transmission of
: electromagnetic radiation in a linear fashion through a vacuum, as
: well as a few other things.

What's the single change that could be made to the earth's situation
which would leave it the same except for lack of seasons? I'm not sure
that has more than one answer, and seems to me to be the most reasonable
interpretation for "what causes the seasons". Anybody have any "I have
here a fine barometer" style answers?

( In judging "the same", ignore secondary effects that ensue
*because* it lacks seasons. )

( I suppose you should consider "change the orbit to be perpendicular to
the spin axis" equivalent to "change the spin axis to be perpendicular
to the orbit". )

( Hm, not sure how to categorize "change light's behavior such that it
always bends to approach earth perpendicular to the spin axis", though
I expect there's a good argument that it should also be considered
equivalent. If legal at all, on the "leave it the same" and/or
"single change" grounds. )


Wayne Throop throopw@xxxxxxxxx http://sheol.org/throopw
.

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