New observations by NASA's Hubble Space Telescope of the glowing gas shroud around an old, dying, sun-like star reveal a new twist.
A new feature of the Landsat Data Continuity Mission will help ensure scientists get a cloud-free view of Earth from space.
The sun emitted a mid-level solar flare, an M7 class, on the morning of May 22, 2013.
NASA and NOAA satellites observed the severe storm system that spawned the Moore, Okla., tornado on May 20, 2013.
In Antarctica in January, 2013 scientists released 20 balloons, to study the giant radiation belts surrounding Earth and how they lose particles, causing electrons from the belts to stream down toward the poles.