Astronomy Picture of the Day · July 20, 2011

Noctilucent Clouds Over Edmonton

The Astronomy Picture of the Day for July 20, 2011 is “Noctilucent Clouds Over Edmonton,” an image. It is credited to Image Credit: Greg Scratchley ( RASC Edmonton ). The original explanation runs about 154 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 20, 2011

Read the full explanation on science.nasa.gov

At a glance

Date: July 20, 2011
Type: Image
Credit: Credit: Image Credit: Greg Scratchley ( RASC Edmonton )
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 154 words

All of July 2011 → · 2011 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 20 in other years

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Source

Astronomy Picture of the Day, July 20, 2011 — science.nasa.gov/image-article/apod-2011-july-20-noctilucent-clouds-over-edmonton

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.