Look at this beautfiul photo showing the Earth’s shadow and the “Belt of Venus” as seen from the Black Range, New Mexico.
The photographer has the following comments:
As the sun sets the shadow of the Earth can be seen to the eastern horizon. This is the darker blue band in this photo. The Earth blocks light from reaching that region of the atmosphere, creating a shadow that we see as a deep blue. Above the shadow, the reddish light from the setting sun does illuminate the atmosphere and reflects back to our eye as a pink (blue + red). This pink band above the blue is known as the anti-twilight arc or the “Belt of Venus”.
Photo by Ed Mackerrow