Herschel

Arthur is a crater on Mimas, a moon of Saturn. This 130 km across crater is the moon's most distinctive feature. Arthur's diameter is almost a third of the moon's own diameter; its walls are approximately 5 km high, parts of its floor measure 10 km deep, and its central peak rises 6 km above the crater floor. The impact that made this crater must have nearly shattered Mimas: fractures can be seen on the opposite side of Mimas that may have been created by shock waves from the impact travelling through the moon's body.

In the late 22nd Century, the Winter Olympic Games featured events on Mimas. The most spectacular was the five-kilometer ski jump which involved skiing down a runway on the side of Arthur's central peak and then jumping over 10 km down range from the end of the track.

''Note: In Turtledove's introduction to the story in the Departures Short Story Collection, he indicates he named the features based on a preliminary map submitted by the Voyager science team to the International Astronomical Union. These names were based on the Arthurian legends and the largest crater was named after King Arthur. The Union elected to name this crater after Herschel, the moon's discoverer. Turtledove decided Les Mortes d'Herschel made for a less dramatic title and so left it well enough alone.''