🚀 go-pugleaf

On Jul 20, 10:49 am, Willie.Moo...@gmail.com wrote:
> 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.htmhttp://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.

I gave you all five gold stars because you're an absolute idiot/moron
of the first order.

 - Brad Guth Brad_Guth Brad.Guth BradGuth