Belt of Venus

monolake

The Belt of Venus or Venus’s Girdle is the Victorian-era name for an atmospheric phenomenon seen at sunrise and sunset. Shortly after sunset or shortly before sunrise, the observer is, or is very nearly, surrounded by a pinkish glow or antitwilight arch that extends roughly 10°–20° above the horizon.

Often, the glow is separated from the horizon by a dark layer, the Earth’s shadow or ‘dark segment.’ The Arch’s light rose (pink) color is due to backscattering of reddened light from the rising or setting Sun. A very similar effect can be seen during a total solar eclipse.

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