Image: Snowing in space?

The flurry of what looks like snow in this video is actually a barrage of energetic particles. This is what's known as a solar radiation storm, hitting an instrument onboard ESA/NASA's Solar and Heliospheric Observatory, or SOHO, on Oct. 29, 2015. These bursts of incredibly fast-moving protons and electrons are fairly common, but this particular event was interesting because they came from an unusual source: a low-level solar flare and two relatively slow coronal mass ejections, as opposed to th