Heaven on Fire is a gallery of some of the most beautiful sunsets ever captured. As the sun sinks toward the horizon, sunlight enters the atmosphere at a much lower angle and consequently must pass through a lot more atmosphere before being seen by an observer. Air molecules scatter away the shorter wavelengths of light (violet and blue) and the only light which penetrates through the atmosphere are the longer wavelengths of light (yellow, orange and red) which produce colorful sunsets. Heaven on Fire is a free screensaver created by RateMyScreensaver.com containing 23 high quality photographs. Screensaver Picture Count: 23 Screensaver Type: Slideshow Credit: All images in this screensaver fall under one of the following licenses: Creative Commons, Attribution ShareAlike 2.0, Attribution ShareAlike 2.5, public domain, GNU Free Documentation License