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[music]

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throughout the sky that is shining down on even the night

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side of the Moon. You get diffuse lighting from all around the sky,

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and we're looking at the reflection from that source of light.

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LAMP stands for Lyman-Alpha

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Mapping Project. It's an experiment that looks in the ultraviolet

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--at the reflected light from the Moon's surface to determine

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composition and whether frost is there.

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Kurt Retherford: So LAMP is neat because we're gonna look at the lunar nightside as well

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as the lunar dayside. We're sensitive enough to look at reflected starlight from the surface

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of the Moon, and also the specific wavelength from

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hydrogen atoms that are sort of shining throughout the solar system.

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[silence]

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Dana Hurley: A spectrograph is a type of instrument that breaks up light into

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its rainbow, so what LAMP does is it breaks up

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the ultraviolet part of the rainbow up into the different

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ultraviolet colors--and it's telling us about

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what the Moon is made out of. So LAMP is going to

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see some things that we haven't seen before because we haven't

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extensively studied this part of the spectrum on the Moon.

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Randy Gladstone: LAMP is able to see in the dark because because at ultraviolet

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wavelengths--which are more energetic photons than we look at

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with our eyes--there's this Lyman-Alpha glow that shines

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on it from all over the place. Kurt Retherford: An instrument quite like

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ours has never been to the Moon, and it's a new generation of instruments

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and we're gonna do a bang-up job of measuring the uliraviolet light coming from the Moon.

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[music]

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[silence]

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[beeping]

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[beeping, silence]