It shows the moon captured in various colours and the image is quite stunning.
NASA explains it like this:
Outside of the Earth's atmosphere, the dark moon, which shines by reflected sunlight, appears a magnificently brown-tinged grey. Viewed from inside the Earth's atmosphere, though, the moon can appear quite different. The featured image highlights a collection of apparent colours of the full moon documented by one astrophotographer over 10 years from different locations across Italy. A red or yellow coloured moon usually indicates a moon seen near the horizon. There, some of the blue light has been scattered away by a long path through the Earth's atmosphere, sometimes laden with fine dust. A blue-coloured moon is more rare and can indicate a moon seen through an atmosphere carrying larger dust particles. What created the purple moon is unclear - it may be a combination of several effects. The last image captures the total lunar eclipse of 2018 July where the moon, in Earth's shadow, appeared a faint red due to light refracted through air around the Earth.
All I know is that it's quite beautiful. No wonder our ancestors worshipped it.
Original source is here.
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