March 2, 2004 — Opportunity studies the eastern plains that stretch beyond the small crater where the rover landed. In the distance, the rim of a larger crater dubbed Endurance can be seen. The highest point visible on Endurance is the highest point on the far wall of the crater; the sun is illuminating the inside of the far wall. Scientists estimated the crater to be 160 meters (175 yards) in diameter, and about 720 meters (half a mile) away from the lander. Between the rover and Endurance are the flat, smooth Meridiani plains, which scientists believe are blanketed in the iron-bearing mineral called hematite. The dark horizontal feature near the bottom of the picture is a small, five-meter (16-feet) crater, only 50 meters (164 feet) from Opportunity's present position. When the rover leaves the crater some two to three weeks from now, Endurance is one of several potential destinations.