... The Tails of Comet NEAT Q4 . ... Endurance Crater on Mars . ... Scroll right to see the inside of Endurance Crater, the large impact feature now being investigated by the Opportunity rover rolling across Mars. ... Scroll right to see the rocks, craters, and hills that were in view for the Spirit rover last week as it continued its trek across Mars. ... Last week, just before sunrise from the northern hemisphere, two bright comets were visible in the same part of the sky at the same time. ...