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Lander Instruments


The goal of the Rosetta Alpha Proton X-ray Spectrometer (APXS) experiment is the determination of the chemical composition of the landing site and its potential alteration during the comet's approach to the Sun. The data obtained will be used to characterize the surface of the comet, to determine the chemical composition of the dust component, and to compare the dust with known meteorite types. These results will be brought into context with other measurements made on the lander and the orbiter to fully obtain a more complete picture of the present state of the comet, and to draw conclusions on its evolution and origin.

APXS (with front side, open and closed), compared to the size of a 1 Deutsche Mark coin

Last Update: 01 December 2015

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