The full crescent of Venus at its inferior conjunction on June 2 2020

Takahashi FSQ-106ED & ZWO ASI183MM

Venus is located between the Earth and the Sun, backlit only 2.4 from the Sun. It's the sunlight refracted and diffused by the Venusian atmosphere that makes the full atmospheric crescent appear.
Inferior conjunctions of Venus occur every 19 months, but close conjunctions with the Sun occur every 8 years: 2012 (last solar transit), 2020, 2028...

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