Valles Marineris, the Deepest Chasm in the Solar System
The photographs coming back from the Martian orbiters sure help you appreciate the very different terrain on the Red Planet.…
Bubble Experiment Fails to Find Dark Matter
Astronomers have no idea what dark matter is, but they have a few guesses. Since they can't see the stuff…
Hubble Finds Dozens of Gravitationally Lensed Galaxies
One of the breakthroughs in modern astronomy is the use of gravitational lenses, where a closer galaxy or star focuses…
Cassini Uncovers Invisible Rings at Saturn
Even in the smallest telescopes, Saturn's bright rings pop into view. But those might be just the tip of the…
Astrosphere for February 19, 2008
It might not look like it, but this photograph is mind-bendingly cool. The bright streak is the path of the…
Space Program At Risk, Panel Says
A panel of 50 space experts met recently to discuss NASA's current direction with its Vision for Space Exploration. While…
World Needs to Aim for Near-Zero Carbon Emissions
If we really want to combat climate change, how much carbon can we reasonably generate? How much will still push…
Listening to the Universe from the Far Side of the Moon
Perhaps one of the best reasons to return to the Moon will be the boon to astronomy. Without an atmosphere,…
Podcast: Lagrange Points
Gravity is always pulling you down, but there are places in the solar system where gravity balances out. These are…
Rocky Planets May Form Around Most Sun-like Stars
Astronomers have found numerous Jupiter-like planets orbiting other stars. But because of the limits of our current technology, they haven't…