Aurora with gradient colors and green

Quick answer：

The Aurora with gradient colors and green refers to the natural phenomenon of the Northern Lights, where the sky above the polar regions lights up with vibrant colors, including green, which is one of the most commonly seen colors. This green light is produced when electrons collide with oxygen atoms in the Earth's upper atmosphere, resulting in the emission of light at a wavelength corresponding to green. The gradient colors in the Aurora can vary depending on the altitude and composition of the atmosphere.