Positions in the solar system in J2000 coordinate system between May 2015 and March 2016. The Sun is in the origin, comet 67P’s trajectory is illustrated with a blue, the Earth’s with a green, Mars’ with a red and the STEREO-A spacecraft’s with a yellow line. The coloured x’s mark the same dates on each line: the first x marks 1 May 2015, the second 1 August 2015, the third 1 November 2015 and the last one marks 1 March 2016.