Polar rain from space creates a secret aurora
While the famous green curtains of the Northern Lights are powered by electrons, a ghostly and silent downpour of solar particles creates a glow that usually eludes the human eye.
On Christmas Day in 2022, a strange and giant glow stretched across the Arctic sky, appearing not as the usual flickering curtains but as a smooth, featureless blanket of light. This was a rare polar rain aurora, a phenomenon typically so faint that it can only be detected by satellites. It occurs when high-energy electrons from the sun's outer atmosphere stream directly into Earth's magnetic poles. While standard auroras are fueled by the solar wind buffeting our magnetic shield, this 'secret' version only becomes visible from the ground when that wind nearly vanishes, as it did during a unique 28-hour window of calm.