NASA's Hubble telescope captures dazzling red glow of Soul Nebula
Image Credit: head topics
NASA's Hubble Space Telescope has captured the brilliant reddish glow of Soul Nebula, also called Westerhout 5, which lies about 7,000 light-years away. The suffusion of red light is caused by a light emission called H-alpha emission. This occurs when a very energetic electron within a hydrogen atom loses energy, causing the electron to become less energetic, and releasing the distinctive red light.