Arachnids

Arachnids

. An enlarged view of a Magellan mosaic of Bereghinya Planita (Fig. 7.9), showing circular structures of up to 230 thousand meters in diameter. Their central domes are surrounded by concentric and radial fractures, like a spider in its web. Such features have been informally dubbed arachnids for their web-like appearance. They are similar in form, but usually smaller than, the circular volcanic structures known as corona (Fig. 7.13). (Courtesy of NASA.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University