(17.10.2019)

We’re all living in a bubble.

In fact, the Sun and the entire solar system exist in a bubble that separates us from interstellar space. But what keeps that bubble inflated? A recent paper found that scientists can account for only 82% of the pressure that steadies the solar bubble, or heliosphere, against pressure from galactic headwinds. The source of 18% of the pressure is still unknown.