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Images from NASA's Mars Reconnaissance Orbiter (MRO) reveal grooves in Martian sand dunes, the remnants of giant pieces of frozen carbon dioxide sledding their way across the planet.The frozen carbon dioxide, more commonly referred to as dry ice, appears to glide along the dunes on cushions of gas similar to a miniature hovercraft, plowing furrows as they go."I've always dreamed of going to Mars," said Serina Diniega, a planetary scientist at NASA's Jet Propulsion Laboratory in Pasadena, Calif., and lead author of a report published online by the journal Icarus. "Now I dream of snowboarding down a Martian sand dune on a block of dry ice."Images from the MRO show grooves, called linear gullies, up to a few yards wide with raised levees along the sides which are covered by carbon dioxide frost during the planet's winter season. The Martian gullies are unlike those on Earth that are formed due to waterfalls.Diniega explains, "In debris flows, you have water carrying sediment downhill, and...
In the search for an Earth-like alien world, astronomers have had their eyes set on planets beyond our solar system, but some moons orbiting some of these exoplanets...
The planet Neptune is about to take center stage in Earth's night sky.On Friday night (Aug. 24) the distant Neptune will reach a point called opposition in the const...
If Christmas this year offers a midnight clear, stargazers could catch a view of a gorgeous close pass of the planet Jupiter and the glowing moon. Here are some com...
An alien planet discovered around a star in the Alpha Centauri system, the nearest to our own sun, has astronomers buzzing, and not just because it's the closest exo...
The company behind an exoplanet-naming contest says it's fighting to restore its business and its reputation in the wake of some disapproving words from the Internat...
NASA unveiled a $17.7 billion spending plan for 2014 today (April 10) that continues major ongoing space exploration projects, while including funds to kick-start an...
Scientists may have discovered the first meteorite from Mercury.The green rock found in Morocco last year may be the first known visitor from the solar system's inne...
A faulty steering apparatus may bring an early end to NASA's Kepler space telescope, a $600 million tool in the space agency's quest for life elsewhere in the univer...
Scientists are trading telescopes for aprons this week to sell Milky Way cupcakes, Saturn cake, and chocolate chip Opportunity cookies in an effort to salvage U.S. p...
NASA plans to drop nearly $310 million from the budget for its Planetary Science division in 2013, a 20 percent cut that affects future missions to Mars, lunar scien...
The largest planet ever discovered is also one of the strangest, and theoretically should not even exist, scientists say.Dubbed TrES-4 , the planet is about 1.7 time...
The unbalanced orbit of a so-called "zombie planet" in a dusty star system has astronomers struggling to explain the exoplanet's behavior.New observations of the pla...
When new planets are discovered beyond the solar system, they often get boring designations such as HD 85512b or Gliese 667Cc. A startup hoping to liven up these nam...
A new analysis of pebble-containing slabs investigated by NASA's Curiosity rover confirms a stream once ran through Gale Crater on Mars.During a pit stop last year, ...
An ancient Egyptian iron bead found inside a 5,000-year-old tomb was crafted from a meteorite, new research shows.The tube-shaped piece of jewelry was first discover...
A newly discovered gaseous planet has been directly photographed orbiting a star about 300 light-years from Earth -- equivalent to 3.7 billion round trip flights to ...
A team of amateurs has discovered evidence for 42 alien planets, including a Jupiter-size world that could potentially be habitable, by sifting through data from a N...
Screaming winds of infernal violence alternate with periods of dead calm as one nears the surface of Uranus, according to a new analysis of the gas giant.The turbule...
An odd flower-like feature spotted on Mars by NASA's Curiosity rover continues to perplex researchers, who nevertheless stress that its origins are not biological.Th...
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