Tag: nasa what are auroras

[ad_1] NASA’s Astronomy Picture of the Day is a mesmerizing snapshot of Auroras spiralling over the night-sky in Iceland. Scientists have long studied Auroras to better understand the workings of Earth's magnetic field and the solar wind. Auroras, also known as the Northern and Southern Lights, put on a mesmerizing show of lights in the night skies of the polar regions. Although auroras are usually green in colour, they can appear as pink sometimes too. Green auroras are formed when energy particles hit the oxygen atoms at 100 km to 300 km from the surface of the planet. But when particles hit at a height lower than 100 km, it results in the formation of pink auroras.NASA's Astronomy Picture of the Day is a mesmerizing snapshot of Spiral Auroras captured over a rock arch in the northw...