The surface mark of an established plume is a hot spot—an isolated region of volcanoes and uplifted terrain located far from the edge of a surface plate.

This' family portrait, 'a composite of the Jovian system, includes the edge of Jupiter with its Great Red Spot, and Jupiter's four largest moons, known as the Galilean satellites.

Then we glissaded down the powdery slopes, jumped aboard our waiting helicopter, and flew to a picnic spot at the edge of an obliterated forest.