Chandrayaan-3’s lander payload RAMBHA-LP (Radio Anatomy of Moon Bound Hypersensitive Ionosphere and Atmosphere – Langmuir Probe) detected an active plasma environment in the Moon’s south polar region. Plasma, the 4th state of matter, is electrically neutral and contains charged particles like ions and free electrons. RAMBHA-LP uses a hypersensitive Langmuir probe mounted on a boom to avoid interference from the lander. It measures electron density and electron temperature near the lunar surface, helping understand the plasma behaviour at the Moon’s South Pole.
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