Jupiter's Auroras . ... HST , NASA Explanation: Auroras are especially large on Jupiter. In pictures released yesterday, the Hubble Space Telescope imaged these unusual light displays in more detail than ever before. Jupiter 's auroras are linked to its volcanic moon Io . ... The resulting auroral displays may be thousands of times brighter than any auroral display on Earth , and involve unusual spots. ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...