NASA Spotted a Vast, Glowing ‘Hydrogen Wall’ at the Edge of Our Solar System

By Rafi Letzter There’s a “hydrogen wall” at the edge of our solar system, and NASA scientists think their New Horizons spacecraft can see it. That hydrogen wall is the outer boundary of our home system, the place where our sun’s bubble of solar wind ends and where a mass of interstellar matter too small to bust […]

Read More NASA Spotted a Vast, Glowing ‘Hydrogen Wall’ at the Edge of Our Solar System

When a Mars Simulation Goes Wrong

By Marina Koren The drive to the little white dome on the northern slope of Mauna Loa is a bumpy one. Mauna Loa, the “Long Mountain,” is a colossal volcano that covers half of the island of Hawaii. The rocky terrain, rusty brown and deep red, crunches beneath car tires and jostles passengers. Up there, more […]

Read More When a Mars Simulation Goes Wrong