Excerpts from a NASA/JPL Press Release November 5, 1999 New images from Galileo reveal unexpected details of the Prometheus volcano on Io including a caldera and lava flowing through fields of sulfur dioxide snow. It appears that the Prometheus volcano on Io has characteristics remarkably similar to those of the Kilauea volcano in Hawaii, although…
The region around the crater Aristarchus (at lower right) has been a focus for observers searching for transient lunar phenomena. This false-color mosaic was assembled from blue, red, and near-infrared images taken by the Clementine spacecraft and represents brightness ratios between the wavelengths. Images taken several weeks apart reveal a surface change in the cobra-head…