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Herschel's view of Comet Siding Spring These three images taken on March 31, 2013 show emission from the dust in the coma surrounding the nucleus of Comet C/2013 A1 – also known as Comet Siding Spring – as observed at three different far-infrared wavelengths in the 70 (left), 100 (middle) and 160 µm (right) bands with ESA's Herschel space observatory. This observation was initiated by Peter Mattisson, an amateur astronomer and the Vice Chairman at the Stockholm Amateur Astronomers (STAR) in Sweden. ESA / Herschel / PACS / Cs. Kiss et al. 2014