Short-wavelength blue and violet are scattered more than other colours; long-wavelength red is scattered least. At sunrise and sunset, the light passes through more air and more atmosphere, so there ...

leaving a greater proportion of longer wavelength red light. The most spectacular sunset displays occur when this red light travels through an airmass that has low levels of pollution or dust ...

earth's atmosphere is bending the red wavelengths of light around the planet. So that redness you see during a blood moon eclipse is a combination of light from every sunrise and sunset on earth ...