Sun, Earth’s Space Environment
Sep 21, 2016
Four NASA spacecraft have performed a thrilling maneuver to understand the physics of explosive reconnection in Earth's magnetosphere.
May 11, 2015
May 11, 2015: One day, when humans go to Mars, they might find that, occasionally, the Red Planet has green skies. In late Dec. 2014, NASA's MAVEN spacecraft detected evidence of widespread auroras in Mars's northern hemisphere. The "Christmas Lights," as researchers called them, circled the... Read More
Universe, Sun, Solar System
May 5, 2015
May 5, 2015: As May of 2015 unfolds, Halley's Comet is more than 5 billion kilometers from Earth, receding into the inky blackness of the outer solar system, where its looping orbit takes it every 76 years. Dim and distant, history's most famous comet won't be back until sometime in 2061.Can’t... Read More
Universe, Earth, Solar System
Apr 30, 2015
April 30, 2015: The planet closest to the Sun is, ironically, one of the coldest.That’s just one of many mind-bending discoveries about Mercury that NASA’s MESSENGER spacecraft beamed back to Earth over the past 7 years. Earlier today, the mission ended with a crash as spectacular as some of its... Read More
Apr 28, 2015
The Amazon rainforest and the Sahara desert seem utterly different. Yet NASA satellites have discovered a surprising connection that intimately links these two disparate parts of our planet.