On October 14, 2014, our Sun let out a great big burp, a coronal mass ejection that swept through the Solar System. Several spacecraft detected the solar blast, resulting in an unprecedented experiment that stretched all the way from Venus to outer reaches of the Solar System.


In the inner Solar System data was collected ESA’s Venus Express and by NASA’s Stereo-A, at Mars by ESA’s Mars Express, NASA’s Mars Odyssey and Maven orbiters and its Curiosity rover, and at Comet 67P/Churyumov–Gerasimenko by Rosetta. In the outer Solar System, the NASA/ESA/ASI Cassini spacecraft felt the effects, and although inconclusive, hints of the CME were also seen at NASA’s New Horizons and Voyager-2.