Last month, an exotic deep space comet flew by Mars and unleashed an unexpectedly strong meteor shower that briefly changed the chemistry of the Red Planet`s upper atmosphere, NASA said Friday.
Scientists are working to determine and to understand the fate of Comet ISON as it moves away from the sun.
A smaller, paler version of Comet ISON may have survived incineration in the sun`s corona and may be brightening, scientists said on Friday.
A comet is heading for a close encounter with the sun later this month, and if it is not vaporized or torn apart, it should be visible to the naked eye in December.
Computer simulations have shown that the early Sun could have stolen comets from neighboring newborn stars 4.5 billion years ago.
Day in Pics: 21st December
Showbiz World - December 21, 2014
People Magazine Awards 2014