A new analysis of data from spacecraft orbiting the Red Planet suggests that gigantic calderas lie disguised on the planet’s surface. If the features are volcanoes, they could help explain the mysterious, fine-grain debris that coats Mars.
A new analysis of crystals in pallasite meteorites suggests that these beautiful objects had a violent birth — but one quite different than scientists had imagined.
An international team of scientists has teased apart the secrets hidden inside a meteorite from Mars, including signs that the rock weathered acidic water while on the Red Planet.
When NASA slammed a probe into a comet last year, researchers were searching for the oldest stuff in the solar system. But what they found no one had expected.
NASA's Cassini spacecraft has discovered the coldest beachfront property in the solar system: dozens of lakes near the north pole of Saturn's moon Titan.
Over the last year, NASA's Cassini spacecraft has repeatedly spotted a debris pocket bulging out of one of Saturn's rings.
As NASA looks to return astronauts to the Moon and send them beyond to Mars, the health hazards posed by solar explosions are a serious concern.
One of the most inhospitable places on Earth might also be one of the best places to do astronomy.
The Hubble Space Telescope's main camera is back online, almost two weeks after a problem with its power supply forced it into safe mode.
The Hubble Space Telescope’s main camera went offline on June 19th, when a problem with its power supply forced it into safe mode.
The cast of underworld characters in the outer solar system expanded by two as the International Astronomical Union (IAU) officially named Pluto's two smallest moons Nix and Hydra.
In January 2006, astronomers focused the Hubble Space Telescope on an icy rock near the orbit of Uranus and found twins.
News outlets reported last week that a meteorite struck a mountainside in Norway, releasing as much energy as the Hiroshima atomic bomb. Now researchers are reporting the first data from the blast, which shows that the event was much more tame. On June 7th, residents of Troms County, Norway, reported that they saw a...
Two astronomers have uncovered a new class of objects orbiting the Sun between Mars and Jupiter: comets disguised as asteroids. Henry Hsieh and David Jewitt (University of Hawaii) report in the March 23rd Science Express that main-belt Asteroid 118401 (1999 RE70) is ejecting a comet-like dust tail. Although the tail is too faint for...
If NASA's Mars Exploration Rover Opportunity were human, it would be more than 600 years old. The rover has lasted almost eight times its life expectancy, logging more than 700 Martian days on the Red Planet's surface. There is little wonder that the robotic dune buggy has developed joint problems. As the rover entered...