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Animal Planet

Tropical Fish Diseases

Wednesday, 02 July 2008

article thumbnailMost disease organisms that affect pet fish are present in the newest aquariums. Majority of these... >> Read Story

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The ozone hole and acid rain were once considered the big-gest environmental concerns. Today, however, they don't hold prominence in the list of potential environmental disasters. Could it be because there never was much to fear in the first place? Foreign Policy finds out... Acid Rain | Acid rain refers to precipitation of any kind with high concentrations of nitric and sulfuric acids. High acidity levels in rain can disrupt... >> Read Story

Speaker - Ruy Pinto

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Bird legs and blocked noses

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Water on the Moon? PDF Print E-mail
Written by Jean-Marc Perreault   
Saturday, 05 July 2008 20:55
Recent headlines have announced a raging controversy among scientists about whether there is actually water ice in the permanently shadowed craters near the lunar poles. Because these permanently shadowed regions are extremely cold (~100K) water ice is expected to be stable there.
If water is present, it will dramatically reduce the cost of a lunar base. The Lunar Crater Observing and Sensing Satellite (LCROSS) mission is intended to test for this water by impacting the lunar surface with its empty rocket upper stage, and looking for water in the ejected plume.

At issue is the evidence for water ice from neutron counts and radar observations of the polar regions.


In the mid-1990s, Earth-based radar observations of the polar regions detected areas of higher circular polarization ratio (CPR). This is the ratio of the reflected radar signal having the same circular polarization as the incident beam to the reflected signal having the opposite polarization.
Last Updated ( Saturday, 02 August 2008 04:20 )
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Water on the Moon?

Saturday, 05 July 2008

article thumbnailRecent headlines have announced a raging controversy among scientists about whether there is actually water ice in the... Read Story >>

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