Astronomy Picture of the Day ·
Equinox on a Spinning Earth
The Astronomy Picture of the Day for September 22, 2021 is “Equinox on a Spinning Earth,” a video. It is credited to Image Credit: Meteosat 9 , NASA , earthobservatory , Robert Simmon. The original explanation runs about 200 words.
Watch the video on the original page From the explanation
“When does the line between night and day become vertical? Today.”
— APOD editors, September 22, 2021
Read the full explanation on science.nasa.gov
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At a glance
- Date
- September 22, 2021
- Type
- Video
- Credit
- Credit: Image Credit: Meteosat 9 , NASA , earthobservatory , Robert Simmon
- Copyright
- No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
- Explanation length
- About 200 words