Two-FaceNASA’s Cassini probe spies Saturn’s moon Enceladus during its final flyby of the icy moon. The shot lays bare Enceladus’ geological activity: the moon’s smooth surfaces (left) are much younger than its heavily cratered ones (right).  
Photograph by NASA/JPL-Caltech/Space Science Institute

Week's Best Space Pictures: Enceladus' Faces and Space Jets

A dwarf planet shows signs of stress and a distant galaxy wags a glowing blue tail.

ByMichael Greshko
Published December 25, 2015

Feed your need for heavenly views of the universe. This week, NASA’s Cassini spacecraft bids farewell to Saturn’s moon Enceladus, a young star generates colorful shockwaves, and the dwarf planet Ceres gets its best-ever closeup.