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===<!--[[Image:red_ring.png|15px|left]]-->Featured article: [[Geologic Processes on the Moon/Cratering on the Moon|Cratering on the Moon]]===
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===<!--[[Image:red_ring.png|15px|left]]-->Featured article: [[Helium]]===
[[Image:GP1Fig_3.jpg|160px|left]] Craters cover the surface of the moon and are the result of hyper-velocity impacts by meteorites. The velocity of meteorites upon impact varies, but is generally between 10 and 40 km/sec. This number is a combination of the ‘approach velocity’ and the ‘escape velocity.’ The approach velocity of objects refers to the velocity of the object with respect to the moon. This varies with the type of object (for example, long period comets generally have a higher approach velocity than short period comets) and the direction with which it approaches the moon (for example, if it approaching the moon ‘head on,’ it will have a higher approach velocity than...([[Geologic Processes on the Moon/Cratering on the Moon|read more]])
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[[File:He-3 T620 01.svg|160px|left]]  
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'''Helium''' is a component of the solar wind, and hence is one of the volatiles found (in parts per million level) in Lunar regolith. It is a Noble gas in group 18 and is the second element in the Periodic Table of the Elements. This element has two stable isotopes: 3 and 4.  
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Helium 3 is a rare isotope of the element Helium, consisting of a nucleus with two protons and one neutron.
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It has been proposed that <sup>3</sup>He might be a possible fuel for a [[Nuclear Fusion]] reactor to produce energy using the thermo-nuclear reaction (Deuterium-Helium-3):
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<sup>2</sup>H + <sup>3</sup>He -->  <sup>4</sup>He + <sup>1</sup>H<sup>+</sup>
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This reaction has the advantage over the more-commonly proposed Deuterium-Tritium  fusion reaction...([[Helium|read more]])
 
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<SMALL><STRONG>[[Featured articles|See all featured articles]]</STRONG> | [[Talk:Featured_articles|Nominate!]]</SMALL>
 
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Revision as of 04:39, 20 June 2019

Featured article: Helium

He-3 T620 01.svg

Helium is a component of the solar wind, and hence is one of the volatiles found (in parts per million level) in Lunar regolith. It is a Noble gas in group 18 and is the second element in the Periodic Table of the Elements. This element has two stable isotopes: 3 and 4.

Helium 3 is a rare isotope of the element Helium, consisting of a nucleus with two protons and one neutron.

It has been proposed that 3He might be a possible fuel for a Nuclear Fusion reactor to produce energy using the thermo-nuclear reaction (Deuterium-Helium-3):

2H + 3He --> 4He + 1H+

This reaction has the advantage over the more-commonly proposed Deuterium-Tritium fusion reaction...(read more)

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