Astronomy Picture of the Day · July 26, 1999

Noctilucent Clouds

The Astronomy Picture of the Day for July 26, 1999 is “Noctilucent Clouds,” an image. The picture is copyrighted by its creator (Credit & Copyright: Pekka Parviainen (NCWG/U. Colorado)). The original explanation runs about 96 words.

From the explanation

“Sometimes it’s night on the ground but day in the air. As the Earth rotates to eclipse the Sun, sunset rises up from the ground.”

— APOD editors, July 26, 1999

Read the full explanation on science.nasa.gov

At a glance

Date: July 26, 1999
Type: Image
Credit: Credit & Copyright: Pekka Parviainen (NCWG/U. Colorado)
Copyright: Copyrighted by the credited creator. Ask the copyright holder before reusing it.
Explanation length: About 96 words

All of July 1999 → · 1999 by month → · Full archive since 1995 →

Topics in this entry

The Sun Eclipses

Topics are matched from words in the title and explanation.

On this day: July 26 in other years

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Source

Astronomy Picture of the Day, July 26, 1999 — science.nasa.gov/image-article/apod-1999-july-26-noctilucent-clouds

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.