Re: Strange "cloud" on Mars
Mars' mystery cloud explained.
"It's most likely a condensate cloud/haze, H2O in composition," Bruce Cantor, senior staff scientist at Malin Space Science Systems, said in an email that was circulated to other experts. "Similar type of phenomena have been seen in early-morning orbital observations in the past."
Cantor pointed to an earlier example of morning-limb clouds, observed by NASA's Mars Global Surveyor in the planet's northern hemisphere in 2003.
http://cosmiclog.msnbc.msn.com/_news/2012/03/30/10945735-mars-mystery-cloud-explained