To see the truth of the Sun, we have to stop looking at its light. Look with human eyes and you see the Photosphere: a blindingly bright surface at about 6,000 Kelvin. It washes out everything else.

This artifact works by blinding the sensor to that visible glare. The SDO Atmospheric Imaging Assembly uses mirrors coated to reflect only extreme ultraviolet light at exactly 171 Ångströms — invisible to the human eye. By ignoring the surface, the instrument reveals the corona: the Sun's superheated outer atmosphere, a place of violent loops and arches usually invisible to us.

The 171 Ångström channel is dominated by iron atoms missing eight electrons (Fe IX), tracing plasma near 600,000 Kelvin. This is not the visible surface but the corona — the Sun's outer atmosphere. The loops and arches are not solid objects: bright plasma outlines magnetic structures, revealing a restless field that ordinary sight cannot isolate.

Each second the Sun fuses roughly 600 million tonnes of hydrogen into helium; about four million tonnes of mass emerge as energy. Churning, electrically conducting plasma and differential rotation sustain the solar magnetic field. The corona's loops trace that invisible architecture, while eruptions release stored magnetic energy. The colours are assigned to an extreme-ultraviolet channel. The Sun does not look like this to human eyes; the instrument translates what our eyes cannot see.