A Blue Moon Halo over Antarctica : Have you ever seen a halo around the Moon? Such 22 degree rings around the Moon – caused by ice crystals falling in the Earth’s atmosphere – are somewhat rare. OK, but have you ever seen a blue moon? Given the modern definition of blue moon – the second full moon occurring in a calendar month – these are also rare. What is featured above might therefore be considered doubly rare – a halo surrounding a blue moon. The featured image was taken late last month near Zhongshan Station in Antarctica. Visible in the foreground are a power generating house and a snowmobile. What might seem to be stars in the background are actually illuminated snowflakes near the camera. via NASAjs
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