Deep Space Exploration

Why we explore Mars—and what decades of missions have revealed

What is Space Weather Video - NASA Science

Like Earth, space has weather. Except instead of swirling winds and downpours of precipitation, space weather is defined by shifting electric and magnetic fields and rains of charged particles. At the very beginning of space, starting just 60 miles above Earth’s surface, there’s a layer of the atmosphere that shifts and changes in concert with both types of weather. The ionosphere is a part of Earth’s atmosphere where particles have been cooked into a sea of electrically-charged electrons and io