NASA Spotted a Vast, Glowing 'Hydrogen Wall' at the Edge of Our Solar System
The sun moves through the galaxy encases in a bubble formed by its own solar wind. In front of the sun, galactic debris builds up, inlcuding hydrogen.
Credit: Alder Planetarium/NASA

There's a "hydrogen wall" at the edge of our solar system, and NASA scientists think their New Horizons spacecraft can see it.