🚀 go-pugleaf

BACK OFF YOU DUMB SPAMMER.
Uzytkownik <Willie.Mookie@gmail.com> napisal w wiadomosci 
news:f22525f7-91a2-426f-9d26-304101757df9@34g2000hsh.googlegroups.com...
Moon is as physically dark as coal?

No - not in the least.

Dark coals - like charcoal - is around 4% - about the same as fresh
asphalt.  The moon's Lambert albedo is around 7.2% - but because
nearly all objects on the lunar surface have the first few millimeters
filled with pores - light enters and exits again, allowing much of the
light coming from the sun, to be scattered at low angles.  So, if you
look at the lunar surface not straight on, but at an angle relative to
the incident light - you get over 11% of the light back when the
appropriate tests are done.   .

Photographing objects on the lunar surface would be as difficult as
photographic objects in a conifer forest on Earth - they have the same
average albedos.

The moon is 3x birghter than asphalt - about as dark as weathered
asphalt after its been in the sun a few years.

http://www.historic101.com/Cuesta/Cuesta_South/Location_B.htm

Which makes it about as bright as a meadow or sandy beach.

http://jeff.medkeff.com/astro/lunar/obs_tech/albedo.htm
http://en.wikipedia.org/wiki/Image:Albedo-e_hg.svg

Ice, snow, clouds - have very high reflectivities.
Water, wet soil, forests, - have very low reflectivities.

Sample albedos
Surface Typical Albedo

Fresh asphalt/charcoal 0.04
Conifer forest (Summer) 0.08
Worn asphalt 0.12
Bare soil 0.17
Green grass 0.25
Desert sand 0.40
New concrete 0.55
Fresh snow 0.80�0.90

Of course just as on Earth, different parts of a planet have different
albedos,

On the moon we have;

Darkest areas:  8.6% - 2x brighter than charcoal
Tranquillitatis south of Plinius: 9.1%
Plato's floor: 9.6%
Serenitatis east of Linne: 10%
Imbrium south of Plato: 10.4%
Nectaris: 11.4% - near the average for the moon
Ptolemaeus floor: 13.1% - 3x brighter than charcoal
Arzachel: 17% -4x brighter than charcoal
Tycho ejecta: 20%  -5x brighter than charcoal
Aristarchus: 20%
Aristarchus interior: 22%
Bright spot in Deslandres: 24% - brighter than green grass
Proclus E wall: 28%
Stevinus A, Abulfeda E: 30% - 6x brighter than charcoal

So, while older textbooks using inappropriate measuring procedures can
be found that quote 7% to 8% - these numbers are artificially low when
one does a more modern measurement that takes into account phase angle
- and arives at a proper value of 11%

The albedo of planets, satellites and asteroids can be used to infer
much about their properties.

The study of albedos, their dependence on
    wavelength,
     lighting angle ("phase angle"), and
     variation in time
comprises a major part of the astronomical field of photometry.

For small and far objects that cannot be resolved by telescopes, much
of what we know comes from the study of their albedos. For example,
the absolute albedo can indicate the surface ice content of outer
solar system objects, the variation of albedo with phase angle gives
information about regolith properties, while unusually high radar
albedo is indicative of high metallic content in asteroids.

The overall albedo of the Moon is around 11%, but it is strongly
directional and non-Lambertian, displaying also a strong opposition
effect. They are typical of the regolith surfaces of airless solar
system bodies - and to observers on the surface, the brightness of
that surface is rather high.

For anyone who believes the moon is as dark as charcoal, please go out
on a dark night of any full moon, and look at the moon in the sky.  It
will appear white against the dark skies.

For anyone who believes the moon is too dark to wash out stars -
compare the number of stars you can see on a clear moonless night to
the number of stars you can see on a night when there's a full moon.

These are rather simple observations to make - its surprising that
anyone who had troubled themselves to actually look at the sky would
believe the bullshit Guthball has been repeating and repeating for
years and years.