Like a dragon breathing fire, a powerful blast of plasma erupts from the
Sun in this colourised view of a ‘coronal mass ejection’.
These huge clouds of magnetised plasma are ejected from the Sun’s
atmosphere – the corona – and launched into interplanetary space.
Millions of tonnes of gas race away from the Sun at several million
kilometres per hour.
This image shows an event observed by the SOHO satellite on 4 January
2002, coloured to indicate the intensity of the matter being ejected by
the Sun. White represents the greatest intensity, red/orange somewhat
less, and blue the least.
An extreme-ultraviolet view is superimposed to show the size and active regions of the Sun that day.
The shaded blue disc surrounding the Sun at the centre of the image
deliberately blots out direct sunlight to allow study of the details in
the corona.
When ejections like this hit planet Earth, spectacular natural light
displays – aurora – can be triggered over the poles. In the most extreme
events, they can lead to geomagnetic storms that can result in regional
power outages and communications blackouts.
This image is featured in a SOHO ‘The Sun as Art’ portfolio in 2002. The original SOHO image can be viewed here.
Source: ESA
