Astronomy Picture of the Day · September 23, 2007

The Equal Night

The Astronomy Picture of the Day for September 23, 2007 is “The Equal Night,” an image. It is credited to Credit: STS-68 Crew , NASA. The original explanation runs about 130 words.

From the explanation

“Today, the Sun crosses the celestial equator heading south at 0951 UT . Known as the equinox, the astronomical event marks the first day of autumn in the northern hemisphere and spring in the south .”

— APOD editors, September 23, 2007

Read the full explanation on science.nasa.gov

At a glance

Date: September 23, 2007
Type: Image
Credit: Credit: STS-68 Crew , NASA
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 130 words

All of September 2007 → · 2007 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: September 23 in other years

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Source

Astronomy Picture of the Day, September 23, 2007 — science.nasa.gov/image-article/apod-2007-september-23-the-equal-night

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.