Features
Fifteen Years of X-Rays from Andromeda’s Supermassive Black Hole
What has the supermassive black hole at the center of the Milky Way’s galactic neighbor been up to? The Chandra X-ray Observatory provides all the details.
Features
Jupiter’s Atmosphere Holds Steady
Astronomers knew that Jupiter’s upper atmosphere could be strangely warm, but only now do they have global maps showing just where those hot spots are and how long they last.