c/2013 a1 siding spring

A nice night sky – on Mars – with a comet

NASA’s Mars Exploration Rover Opportunity captured images of a comet passing much closer to Mars than any previous known comet flyby of Earth or Mars. The images of comet Siding Spring were taken against a…


Comet at Mars

Today comet C/2013 A1 Siding Spring will pass withing 140,000 km from Mars. Here are some pictures taken last year with the now defunct satellite Herschel. These three images show emission from the dust in…