Astronomy Picture of the Day · April 21, 2003

A Halo Around the Moon

The Astronomy Picture of the Day for April 21, 2003 is “A Halo Around the Moon,” an image. The picture is copyrighted by its creator (Credit & Copyright: Sarah McKay). The original explanation runs about 118 words.

From the explanation

“Have you ever seen a halo around the Moon? This fairly common sight occurs when high thin clouds containing millions of tiny ice crystals cover much of the sky.”

— APOD editors, April 21, 2003

Read the full explanation on science.nasa.gov

At a glance

Date: April 21, 2003
Type: Image
Credit: Credit & Copyright: Sarah McKay
Copyright: Copyrighted by the credited creator. Ask the copyright holder before reusing it.
Explanation length: About 118 words

All of April 2003 → · 2003 by month → · Full archive since 1995 →

Topics in this entry

The Moon

Topics are matched from words in the title and explanation.

On this day: April 21 in other years

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Source

Astronomy Picture of the Day, April 21, 2003 — science.nasa.gov/image-article/apod-2003-april-21-a-halo-around-the-moon

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.