The Belt of Venus . ... During a cloudless twilight , just before sunrise or after sunset , part of the atmosphere above the horizon appears slightly off-color, slightly pink. Visible in the above photograph, this off-color band between the dark eclipsed sky and the blue sky can best be seen in the direction opposite the Sun and is called the Belt of Venus . ... In the Belt of Venus, however, the atmosphere reflects light from the setting (or rising) Sun which appears more red . ...