The Sun is always mesmerising to watch, but Solar Orbiter captured a special treat on camera: a dark ‘prominence’ sticking out from the side of the Sun.
The dark-looking material is dense plasma (charged gas) trapped by the Sun’s complex magnetic field. It looks dark because it is cooler than its surroundings, being around 10 000 °C compared to the surrounding million-degree plasma.
When viewed against the background of space, the hovering plasma is referred to as a prominence. When viewed against the Sun’s surface, it is called a filament. (In this image you can see examples of both.)
Solar prominences and filaments extend for tens of thousands of kilometres, several times the diameter of Earth. They can last days or even months. This video shows one hour of footage, sped up to make movement more clearly visible.
Solar Orbiter recorded this video with its Extreme Ultraviolet Imager (EUI) instrument on 17 March 2025. At the time, the spacecraft was around 63 million km from the Sun, similar to planet Mercury.
Solar Orbiter is a space mission of international collaboration between ESA and NASA. The EUI instrument is led by the Royal Observatory of Belgium (ROB).
[Video description: Close-up video of the Sun, filling the left half of the view, its surface covered what looks like moving, glowing hairs accompanied by some short-lived bright arcs. Protruding to the right, in the centre of the video, is dark material that looks almost feathery, with thin streaks flowing both away from and towards the Sun.]