Aurora

An aurora was a natural light display in the sky. It was caused by particles excited by energetic charged particles travelling along magnetic field lines into a planet's upper atmosphere. (COMIC: The First)

In northern latitudes this effect was known as the aurora borealis. Goronwy saw such an effect in the skies of Wales. (TV: Delta and the Bannermen) The Sixth Doctor compared the colourful sky of Kapron to the aurora borealis. (AUDIO: The Macros)

In southern latitudes this effect was known as the aurora australis. The Tenth Doctor and Martha Jones came to Antarctica in 1915 to watch the aurora australis. (COMIC: The First)

During his first visit to Vortis, the First Doctor saw lights in the sky which looked like the aurora borealis. (PROSE: The Lost Ones) On a subsequent visit, both he and Ian Chesterton saw these lights, the latter also comparing it to the aurora borealis. (TV: The Web Planet)

The Fourth Doctor and Sarah Jane Smith came to the Sigimund Galaxy to watch the aurora arctialis, which was caused by three suns. (COMIC: The Traitor) In an alternate universe, Omega saw the aurora arctialis. (PROSE: The Infinity Doctors)

The Tenth Doctor and Rose Tyler came to Serac to see the aurora. (COMIC: The Betrothal of Sontar)