An amateur astronomer Alex Cherney, put together an awesome time-lapse video of the Australian night sky over the ocean. The clip includes 30 hours of exposure (don't worry, it's condensed down into two minutes and 41 seconds), which took over one year to compile.
The Hessdalen light most often is a bright, white or yellow, green light of unknown origin standing or floating above the ground level. There are numerous working hypotheses: 1. A combustion process in the air involving clouds of dust from the valley floor containing scandium 2. The lights are formed by a cluster of macroscopic Coulomb crystals in a plasma produced by the ionization of air and dust by Alpha particles during radon decay in the dusty atmosphere.