NASA Logo in the header
Sciences and Exploration Directorate 
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In Development

Surface and Exosphere Alteration by Landers (SEAL)

The Surface and Exosphere Alteration by Landers (SEAL) instrument aims to investigate the interaction of lunar regolith with volatiles from the lander's rocket exhaust.

Organization
Launch Date

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Class

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Website

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Key Staffs

SEAL will begin taking measurements as the lander enters orbit about the Moon and throughout its descent to the surface. The spectrometer will measure the gas that gets released by the lander’s propulsion system into the Moon’s atmosphere, which is called an exosphere.After touching down, SEAL will sniff out the engine exhaust molecules that will have made it to the Moon’s surface. Among the molecules of interest for SEAL are water and carbon dioxide, which the team expects will diffuse into the atmosphere as the surface gets heated by the Sun. The team will pay special attention to which molecules get stuck in the lunar soil and which break free and drift above the surface, possibly to different parts of the Moon, such as the poles. This will help scientists determine how temperature affects molecules on the Moon that can easily evaporate, known as volatile molecules. Ultimately, this will provide insight into the stability of water, a critical resource for exploration.

Contact Us

For general inquiries about the Sciences and Exploration Directorate.

Jocelyn Lynch

Project Support Specialist

301-286-6066 jocelyn.m.lynch@nasa.gov
Ellie Jeffries

Project Support Specialist

301-286-6066 ellie.jeffries@nasa.gov
Technical issues with this website may be reported to ben.pelletier@nasa.gov.
General inquiries about the scientific programs at NASA's Goddard Space Flight Center may be directed to the Center Office of Communications at 1.301.286.8955.