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The Rutherford-Appleton Laboratories in the UK designed and built the Heliospheric Imagers on STEREO that can image and follow the material ejected by the Sun all the way to the Earth.
After a small CME hit Earth on 16 December 2008, Chris Davis of the Rutherford Appleton Laboratory at Harwell, Oxfordshire, UK, and colleagues examined images taken in the preceding few days by wide-angle cameras called Heliospheric Imagers on the STEREO spacecraft.
The university has also delivered Heliospheric Imagers which will follow the progress through space of a bubble of plasma by tracing its reflected light.