Image Gallery: fog in Valles Marineris

Water fog in the Valles Marineris canyons. Image Credit: ESA/DLR/FU Berlin

After yesterday’s exciting news about the Curiosity rover finding methane and organics on Mars, here is a reminder that the planet is rather Earth-like in other ways too, such as having water clouds and fog. This well-known image is from the Mars Express spacecraft, showing dense fog filling canyons in Valles Marineris, the giant canyon system that dwarfs Earth’s Grand Canyon. Even in Mars’ thin… Read More

Curiosity rover finds methane and organics on Mars

NASA's Mars rover Curiosity drilled into this rock target, "Cumberland," during the 279th Martian day, or sol, of the rover's work on Mars (May 19, 2013) and collected a powdered sample of material from the rock's interior.

NASA’s Mars Curiosity rover has measured a tenfold spike in methane, an organic chemical, in the atmosphere around it and detected other organic molecules in a rock-powder sample collected by the robotic laboratory’s drill. “This temporary increase in methane – sharply up and then back down – tells us there must be some relatively localized source… Read More

Strong winds explain Titan’s immense dunes, according to new study


Saturn’s largest moon Titan is one of the most Earth-like places in the Solar System, as least in terms of appearances, with its seas, lakes, and rivers (of liquid methane/ethane). But it is similar in another way as well, with vast stretches of huge wind-blown dunes in its equatorial regions. Only Earth, Venus, and Mars are known to have such dunes… Read More