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    coma of comet 67P/Churyumov-Gerasimenko tagged posts

    Rosetta’s Mass Spectrometer ROSINA detected Argon at Comet Churyumov-Gerasimenko

    September 28, 2015, Categories  Astronomy/Space

    DFMS mass spectra in the m/z ranges of 36 and 38. The spectra demonstrate the clear identification of the two isotopes 36Ar and 38Ar and of the interfering molecules. The exact m/z locations are given in the text. The spacecraft background spectra were obtained before the cometary signal became apparent (2 August 2014, heliocentric distance of 3.6 AU, almost 800 km from the nucleus).

    DFMS mass spectra in the m/z ranges of 36 and 38. The spectra demonstrate the clear identification of the two isotopes 36Ar and 38Ar and of the interfering molecules. The exact m/z locations are given in the text. The spacecraft background spectra were obtained before the cometary signal became apparent (2 August 2014, heliocentric distance of 3.6 AU, almost 800 km from the nucleus).

    This measurement adds to the debate about the role of comets in delivering various “ingredients,” such as water, to Earth. Comets are considered to be representative of icy planetesimals that may have contributed a significant fraction of the volatiles to planets in the very early solar system...

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