MIRO maps water in comet's coma
http://blogs.esa.int/rosetta/2015/06/19/miro-maps-water-in-comets-coma/
MIRO, the Microwave Instrument for the Rosetta Orbiter, first detected the
emission from water molecules in the coma of Comet 67P/C-G on 6 June 2014,
when Rosetta was 350,000 km from the comet, approximately equivalent to the
distance of the Earth from the Moon. At the time, the comet was 3.9 AU –
about 580 million km – from the Sun.
Since early July 2014, the MIRO team have been continuously monitoring water
in the comet's environment, measuring its properties at different locations
across the coma. Being in very close proximity to 67P/C-G, Rosetta, with the
MIRO instrument on board, can 'dissect' the distribution of water and other
molecules around the comet. Existing ground-based observatories and
near-Earth space telescopes can at most get a global view of water in the
outermost parts of a comet's coma.
(節錄而已 有興趣的請直接點連結去看吧 還有圖片)
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