oriel36 <
kellehe...@gmail.com> wrote:
>On Apr 17, 1:21�am,
thro...@sheol.org (Wayne Throop) wrote:
>> :
d...@gatekeeper.vic.com (David DeLaney)
>> : "Always has the same face pointed towards Earth as it goes around it"
>> : is VERY VERY DIFFERENT FROM "does not spin as it orbits the Earth".
>> : If the latter were the case, we'd see all around the Moon, once, as it
>> : went around the Earth; each night (or day) we'd see the side that was
>> : currently facing us, and that side would change as though we were
>> : seeing the Moon spin about 12 degrees or so each day. �(360 degrees
>> : around the Earth divided by about 30 days.)
>> :
>> : We don't see that.
>>
>> Oh he's impervious to that argument. [...]
>>
>> Yea verily, the crack in his pot runs deep and wide.
>
>
>If you can see the moon spin 360 degrees once in a month then you have
>bigger problems than I can deal with.
But we do see that. At one time in the month, the side facing us is pointing
towards the constellation of Aries in the zodiac (which is then on the other
side of the Earth from the Moon). About half a month later, that same side,
still facing us, is pointing towards the constellation of Libra, halfway around
the ecliptic from Aries (and which is THEN on the other side of Earth from the
Moon, since the Moon's gone halfway around the Earth in the meantime). And
half a month later, that SAME side is pointing back at Aries again. Standing
anywhere on the Moon's equator, or anywhere sort of near it, and ignoring
that the Earth is standing mostly-still in the sky and the Sun is moving a
little with respect to the stars, you see the entire sky sloooowly turning,
completing one revolution around you every 27 and a third Earth-days. This
means that:
the Moon is TURNING, spinning, inside the Universe. Once every 27.32 Earth
days. If it were NOT SPINNING, then standing at a particular point on it you
would always be facing the EXACT SAME STARS. This does not happen; you see
the stars go around you every 27.32 days, instead, meaning that's the time
it takes for the Moon to spin once on its axis. Since the Moon is tide-locked
in its orbit, this is ALSO the time it takes to go once around the Earth.
[To come back to the same _phase_ exactly takes it 29.53 days, because in
the meantime the Earth's going around the Sun too.]
>When the moon is between the
>Earth and the Sun,a new moon from our point of view,an astronaut on
>the moon can look out at the gorgeous planet he is orbiting and see
>what a spinning object looks like -
And behind the Earth he can see a particular background of stars.
Over the course of the next month, as he sees the Sun slowly go around once or
so in the sky, the stars he sees behind the Earth -change-. They move, at a
slightly different speed from the Sun, so that over the course of 27.32 Earth
days he sees the entire journey round the sky, behind the Earth. This means
that while the Moon is always facing the Earth, at that point on its surface,
it's SPINNING with respect to the Universe, which is what counts.
>Perhaps I have got the wrong crowd.
Perhaps. I'd think your screeds would go better to a crowd that had no idea
what-so-ever how things outside the Earth's atmosphere worked; perhaps some
people who still thought the Earth was flat and that the Moon and Sun were
just big lamps floating a few hundred miles up? Because for anyone who DOES
know how circles and balls and ellipses work, your mistake is REALLY REALLY
OBVIOUS, way more obvious than what you think the obviousness factor should
be that every other scientist is overlooking, yet you totally refuse to hear
that you're the one that has the mistake, and totally refuse to think about
any of the simple ways to see why your mistake is messing you way up.
Dave
--
\/David DeLaney posting from
d...@vic.com "It's not the pot that grows the flower
It's not the clock that slows the hour The definition's plain for anyone to see
Love is all it takes to make a family" - R&P. VISUALIZE HAPPYNET VRbeable<BLINK>
http://www.vic.com/~dbd/ - net.legends FAQ & Magic / I WUV you in all CAPS! --K.