[Info-vax] CRTL and RMS vs SSIO

[Dave Froble]

On 10/15/2021 3:03 AM, Lawrence D’Oliveiro wrote:
> On Friday, October 15, 2021 at 7:00:42 PM UTC+13, Phillip Helbig (undress to reply) wrote:
>> It recedes to conserve angular momentum, which is necessary because the
>> Earth's rotation is slowing down because of the tides.
>
> Ah, of course, yes.
>
>>> Yes. And also the fact that the Moon is so large compared to the Earth. We =
>>> are really in a binary-planet system, though for some reason astronomers do=
>>> n't like that description ...
>>
>> That depends on the definition of planet.
>
> A major body which orbits the Sun? if Terra is one such, then Luna must be one too.
>

Well if one wants to be a bit more accurate, Earth and Luna is a binary system orbiting
a common center and that binary system is then orbiting (sort of, many variables) the
local star, which itself is also moving.  Trying to be precise about things is sort of
tough, as all is moving relative to some supposed location which might be called the
center of the universe.  It's enough to make your brain hurt just trying to imagine
it all.

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David Froble                       Tel: 724-529-0450
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