Re: Apple and Earth

Graham Lee <uk.ac.ox.physics.teaching@xxxxxxxxxxxx> wrote:

> PeterD wrote:
> > Richard Tobin <richard@xxxxxxxxxxxxxxx> wrote:
> >
> >>In article <1h3yvxv.1k9sf19d9ous7N%pd.news@xxxxxxxxxxxxxxxxx>,
> >>PeterD <pd.news@xxxxxxxxxxxxxxxxx> wrote:
> >>
> >>>I have a few whole Earth photos from the various NASA sites, but none in
> >>>full sunlight.
> >>
> >>The photographer would have to be close to exactly between the earth
> >>and the sun for that. Which would only happen for brief periods
> >>during a flight to the moon. (When they were *on* the moon it
> >>certainly wouldn't be in full sunlight, otherwise they would be in the
> >>dark on the moon.)
> >
> > So? They were in the dark on the moon missions plenty, especially the
> > Lunar Orbiter.
> > You know there is no "dark side" of the moon? Well, there is, but it's
> > not the same side all the time.
> >
> Ermm...? Being at a different point on the moon's surface doesn't
> [significantly] change the phase of the Earth

Er, yeah. That's what's known as a brainlock. Still, taking Apollo 11 as
an example, liftoff was on 16th July 1969, which was new moon. For the
first couple of days on the outward journey, Earth would have been
pretty full.

> - what I think Richard
> meant was that Tranquility Base would only see a full Earth during a new
> moon, at which point TB would be a rather dark place; it wasn't when the
> moon landings were filmed hence no full Earth photo from the moon's surface.

Er, yeah of course I knew that. Heh.

--
Pd
.

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