Crescent Dione

Caption NASA:"This high-phase view of Dione shows the great contrast between the highly reflective "wisps" and the surrounding terrain. These wispy lines are geologically young fractures exposing the icy surface of the moon.
Lit terrain seen here is on the Trailing Hemisphere of Dione (about 1123 Km, or approx. 698 miles, across). North on Dione is up.

The view was acquired from a position 39° South of the moon's Equator. The image was taken in Visible Light with the Cassini Spacecraft narrow-angle camera on Dec. 26, 2008. The view was obtained at a distance of approx. 789.000 Km (about 490.000 miles) from Dione and at a Sun-Dione-spacecraft, or Phase, Angle of 124°
Image scale is roughly 5 Km (about 3 miles) per pixel".