SpaceJupiter’s powerful aurora is surprisingly different from Earth’s We always assumed that auroras on Jupiter were caused by the same process that brings the swirling light shows to Earth. New observations show that they aren’t 51¶¯Âþ
SpaceIce at Mars’s equator hints the planet was once much more tilted Most of the water on Mars is at its poles, but ice near the equator may mean that the way the red planet is tilted has changed over the last few million years 51¶¯Âþ