Artists impression of the twin STEREO satellites

The Heliospheric Imager for the NASA STEREO Mission

Part of the SECCHI Consortium

Stereo Ahead has now returned to normal operations, we now need to establish standard f-coronal modelling and will restart normal movie production shortly


Images of a recent Earth-directed Coronal Mass Ejection (CME) taken by the RAL-led Heliospheric Imager (HI) instruments on the STEREO-A (HI-1A: left hand panel) and STEREO-B spacecraft (HI-1B: right hand panel). This CME, which was launched at around 0 UT on 15 March 2013, resulted in significant auroral activity at Earth. Around this time, the HI instrument on STEREO-B was also observing the passage of Comet C/2011 L4 (PANSTARRS). A plethora of stars, and various planets, are also visible in the HI field of view. A movie can also be downloaded here .

stereo sees comet Panstarrs and a Earth directed coronal mass ejection