Astronomy Picture of the Day · January 9, 2002

Blue Flash

The Astronomy Picture of the Day for January 9, 2002 is “Blue Flash,” an image. The picture is copyrighted by its creator (Credit & Copyright: Mario Cogo). The original explanation runs about 180 words.

From the explanation

“Difficult to observe, the momentary green flash above the rising or setting sun has been documented as a phenomenon caused by the atmospheric bending or refraction of sunlight.”

— APOD editors, January 9, 2002

Read the full explanation on science.nasa.gov

At a glance

Date: January 9, 2002
Type: Image
Credit: Credit & Copyright: Mario Cogo
Copyright: Copyrighted by the credited creator. Ask the copyright holder before reusing it.
Explanation length: About 180 words

All of January 2002 → · 2002 by month → · Full archive since 1995 →

Topics in this entry

The Sun

Topics are matched from words in the title and explanation.

On this day: January 9 in other years

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Source

Astronomy Picture of the Day, January 9, 2002 — science.nasa.gov/image-article/apod-2002-january-9-blue-flash

Copy taken Oct 28, 2026, 2:39 AM EDT. The image and explanation belong to their creators. OpenOrbit is not affiliated with or endorsed by NASA.