NASA/ESA’s Hubble Space Telescope captured comet Siding Spring as it made its closest approach to Mars on 19 October 2014 at 20:27 CEST (18:27 GMT). The image is a unique composite of Hubble exposures taken between 18 October at 14:06 CEST (12:06 GMT) to 20 October, 05:17 CEST (03:17 GMT). Hubble took a separate image of Mars on 19 October at 04:37 CEST (02:37 GMT).