Above is a composite image of the Sun using four different wavelengths of extreme ultraviolet light that were separated into colour channels and then recombined by the STEREO project.

STEREO-A and STEREO-B are spacecrafts dedicated to studying our sun. STEREO-B lags behind Earth and STEREO-A orbits one million miles ahead. Together the two spacecrafts combine their images to capture 3D movies of solar storms.

The black spot is the moon. Normally when we view an eclipse, the moon is larger and completely blocks out the Sun. The moon is small here because of how STEREO-B saw it.

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