In 1831, a baffling celestial phenomenon left humanity questioning the heavens: the sun turned blue. This eerie spectacle, visible across vast swathes of the globe, plunged societies into ...

The European Space Agency (ESA) has released an audio-visual representation of solar activity over the last three years, pulling data from its Solar Orbiter probe, which it runs with NASA.

Researchers have discovered the origins of a 200-year-old volcanic eruption that ejected so much sulfur into the atmosphere that it changed the climate and made the sun look blue. In 1831 ...