Live Science reports: Auroras are produced when solar particles that are ejected from the sun and carried to Earth by solar winds collide with electrically charged particles in Earth’s magnetic field, triggering reactions in the upper atmosphere that release light.

They are most commonly glimpsed on Earth at high latitudes, in the Northern and Southern hemispheres. While auroras are typically green, they can also appear violet, red, blue, while or pink, according to NASA.

To produce the auroras video, NASA partnered with media infrastructure experts at Harmonic, with whom they also launched a new UHD channel featuring 4K content — the first noncommercial UHD channel in North America — the agency said in a statement. [Continue reading…]