Astronomy Picture of the Day · December 21, 2025

Solstice on a Spinning Earth

The Astronomy Picture of the Day for December 21, 2025 is “Solstice on a Spinning Earth,” a video. It is credited to Image Credit: Meteosat 9 , NASA , Earth Observatory , Robert Simmon. The original explanation runs about 207 words.

Watch the video on the original page

Credit: Image Credit: Meteosat 9 , NASA , Earth Observatory , Robert Simmon Shown from the original page. Not hosted by OpenOrbit.

From the explanation

“Can you tell that today is a solstice by the tilt of the Earth? Yes.”

— APOD editors, December 21, 2025

Read the full explanation on science.nasa.gov

At a glance

Date: December 21, 2025
Type: Video
Credit: Credit: Image Credit: Meteosat 9 , NASA , Earth Observatory , Robert Simmon
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 207 words