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.

2007 February 3

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Alborz Mountains in Moonlight
Credit & Copyright: Babak Tafreshi

Explanation: On January 25th, light from a first quarter Moon illuminated this dreamlike landscape looking across the rugged, snow-covered peaks of the Alborz Mountain Range in northern Iran. The stunning sky is filled with stars, including the yellow-tinged Betelgeuse at the shoulder of Orion. Sirius, alpha star of Canis Major and the brightest star in planet Earth's night, stands above and left of picture center. The eerie glow along the Haraz valley in the foreground is light from cars traveling a highway leading from Tehran to the Caspian Sea.

Tomorrow's picture: martian robot

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