A powerful solar eruption, known as a coronal mass ejection (CME), caused Earth’s magnetic shield to temporarily vanish, revealing a unique phenomenon known as Alfvén wings. The discovery provides insights into the dynamics of magnetic fields around other celestial bodies, including Jupiter’s moon Ganymede.
A unique, smooth, and featureless aurora observed over Norway during Christmas 2022 was caused by a rare phenomenon called ‘polar rain,’ where high-energy electrons from a coronal hole on the sun rained directly onto Earth’s poles. This event, captured by ground-based cameras, provided the first-ever observation of this type of aurora from Earth.
