Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. Yogi Rock is a prominent visible feature at the Pathfinder landing site . Yogi and surrounding soil are being examined close up by the Sojourner robot rover. Initial attempts to approach the rock and to place Sojourner's Alpha Proton X-ray Spectrometer against it have met with some minor, but not unusual, difficulties .
Specific rights apply .