Astronomy Picture of the Day

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

2024 September 1
The featured image shows a crescent Moon over a city
and volcano with a flat cloud running through the center that
makes the Moon look a bit like the planet Saturn.
Please see the explanation for more detailed information.

The Moon Dressed Like Saturn
Image Credit & Copyright: Francisco Sojuel

Explanation: Why does Saturn appear so big? It doesn't -- what is pictured are foreground clouds on Earth crossing in front of the Moon. The Moon shows a slight crescent phase with most of its surface visible by reflected Earthlight, known as Da Vinci glow. The Sun directly illuminates the brightly lit lunar crescent from the bottom, which means that the Sun must be below the horizon and so the image was taken before sunrise. This double take-inducing picture was captured on 2019 December 24, two days before the Moon slid in front of the Sun to create a solar eclipse. In the foreground, lights from small Guatemalan towns are visible behind the huge volcano Pacaya.

Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)
Tomorrow's picture: Sun hoverer


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