The first meteor ever seen on Mars has been traced to a trail left by comet Wiseman-Skiff, a wanderer of the solar system that takes six-and-a-half years to orbit the sun, French astronomers said. The meteor was recorded as a long streak against the inky Martian sky on March seven, 2004 by the panoramic camera of Spirit, the US Mars exploration Rover. The team suggests the grazing trajectory of the streak shows it was caused by debris deposited in past years by Wiseman-Skiff.