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Astronomy Picture of the Day

Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2025 April 22

Explanation: What's different about this Moon? It's the s. In the featured image, you can't directly see any -- the line that divides the light of day from the dark of night. That's because the is a digital composite of many near-terminator lunar strips over a full . Terminator regions show the longest and most s -- shadows which, by their contrast and length, allow a flat photograph to appear . The overlay images were taken over two weeks in early April. Many of the Moon's stand out because of the s they all cast to the right. The image shows in graphic detail that the are not just darker than the rest of the -- they are also .

Authors & editors: () & ()
NASA Official: Amber Straughn .
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