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Moon: NASA's Lunar Portal
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LADEE Mission to Earth's Moon


Goals: The Lunar Atmosphere and Dust Environment Explorer (LADEE) is designed to study the Moon's thin exosphere and the lunar dust environment. An "exosphere" is an atmosphere that is so thin and tenuous that molecules don't collide with each other. Studying the Moon's exosphere will help scientists understand other planetary bodies with exospheres too, like Mercury and some of Jupiter's bigger moons. The orbiter will determine the density, composition and temporal and spatial variability of the Moon's exosphere to help us understand where the species in the exosphere come from and the role of the solar wind, lunar surface and interior, and meteoric infall as sources. The mission will also examine the density and temporal and spatial variability of dust particles that may get lofted into the atmosphere.

The mission also will test several new technologies, including a modular spacecraft bus that may reduce the cost of future deep space missions and demonstrate two-way high rate laser communication for the first time from the Moon.

Accomplishments: During its primary mission, LADEE established a baseline of data for the tenuous lunar atmosphere, or exosphere, and dust impacts. The mission was given a 28-day extension in January 2014.

Key Dates
6 Sep 2013:  Launch (11:27 p.m. EDT)
6 Oct 2013:  Lunar Orbit Insertion
10 Nov 2013:  Science Mission Begins
4 Apr 2014 - 21 Apr 2014:  Lunar Impact (Estimated)
Status: In Flight
Fast Facts
LADEE Facts LADEE will help determine the impact of increased human activity on the Moon's thin exosphere.

Because the Moon's atmosphere is so thin, disturbances could quickly swamp its natural composition.

If scientists are ever to know the lunar atmosphere in a relatively natural state, now is the time to look.
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Last Updated: 3 Feb 2014