Homing In On Black Holes
To gain insight into the most mysterious objects in the universe, astronomers shine a light at the chaotic core of our Milky Way
By Robert Irion
Hubble's Last Hurrah
The orbiting space telescope has captured star births and deaths, galactic collisions and the accelerating expansion of the universe. A final tuneup should ensure a few more years of its unique vision
By Laura Helmuth
Out of This World
In the past decade, extraordinary space missions have found water on Mars, magnetic storms on Mercury and volcanoes on the moons of Saturn
By Laura Helmuth
Galileo's Vision
Four hundred years ago, the Italian scientist looked into space and changed our view of the universe
By David Zax
Lunar Bat-men, the Planet Vulcan and Martian Canals
Five of science history's most bizarre cosmic delusions
By Erik Washam
