Mars' seasonal cap of carbon dioxide ice as it sublimates (goes directly from ice to vapor) in the Martian spring© AFP 2013/ NASA / JPL-Caltech
MOSCOW, September 12 (RIA Novosti)
Scientists have received the clearest evidence yet of carbon-dioxide snowfalls on Mars based on data provided by NASA's Mars Reconnaissance Orbiter (MRO), NASA reported on Tuesday.
Frozen carbon dioxide, known as "dry ice," requires temperatures of about minus 193 degrees Fahrenheit (minus 125 Celsius). The report is being published in the Journal of Geophysical Research, NASA said.
"These are the first definitive detections of carbon-dioxide snow clouds," the report's lead author, Paul Hayne of NASA's Jet Propulsion Laboratory in Pasadena, California, said.
"We firmly establish the clouds are composed of carbon dioxide - flakes of Martian air - and they are thick enough to result in snowfall accumulation at the surface,” he said.
NASA described that as the only known example of carbon-dioxide snow falling in our solar system.
Add to blog
You may place this material on your blog by copying the link.
Image Galleries: The World’s Most Notorious Prisons
Infographics: Group of Eight: Countries and Permanent Members
Cartoons: Polar Explorer Day
The formation of the Russian Popular Front (RPF) could be a positive development in Russian politics. While it is clear that Russia still lacks a full-fledged multiparty system, the fact is that such systems are in crisis elsewhere in the world. Traditional political parties are growing increasingly inadequate and outmoded. Their time has passed.