Astronomy Picture of the Day . Mars: Big Crater in Stereo . ... Credit: Mars Global Surveyor Project , MSSS , JPL , NASA Explanation: Get out your red/blue glasses and check out this stereo picture of "Big Crater" on Mars! ... At just under a mile in diameter, Big Crater is not all that big but it is an important landmark in the vicinity of the Mars Pathfinder landing site on an ancient flood plain in Ares Vallis. ... Publications with keywords: mars pathfinder - Mars - crater . ... Mars in View . ...