The planet’s elusive aurorae are much colder than expected, which is how they evaded detection for so long.

Astronaut Don Pettit captured the moment a vivid green aurora appeared below the International Space Station orbiting the earth. Posting to X, Pettit explained they rotated 180 degrees and flew ...

New observations have revealed that we were wrong about the length of a day on Uranus. According to the most precise ...