Astronomy Picture of the Day ·

The Umbra of Earth

The Astronomy Picture of the Day for September 11, 2025 is “The Umbra of Earth,” an image. The picture is copyrighted by its creator (Image Credit & Copyright: Wang Letian ( Eyes at Night )). The original explanation runs about 187 words.

The Umbra of Earth
Credit: Image Credit & Copyright: Wang Letian ( Eyes at Night ) Copyrighted Shown from science.nasa.gov. Not hosted by OpenOrbit.

From the explanation

“The dark, inner shadow of planet Earth is called the umbra . Shaped like a cone extending into space, it has a circular cross section most easily seen during a lunar eclipse .”

— APOD editors, September 11, 2025

Read the full explanation on science.nasa.gov

At a glance

Date
September 11, 2025
Type
Image
Credit
Credit: Image Credit & Copyright: Wang Letian ( Eyes at Night )
Copyright
Copyrighted by the credited creator. Ask the copyright holder before reusing it.
Explanation length
About 187 words

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Topics in this entry

The MoonEclipses

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On this day: September 11 in other years

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Source

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.