Astronomy Picture of the Day ·
Equinox and Eruptive Prominence
The Astronomy Picture of the Day for September 23, 1999 is “Equinox and Eruptive Prominence,” an image. It is credited to Credit: SOHO – EIT Consortium, ESA, NASA. The original explanation runs about 117 words.
From the explanation
“Today, the Sun crosses the celestial equator and seasons change from Summer to Fall in the north and Winter to Spring in the southern hemisphere. Defined by the Sun’s position in sky the event is known as an equinox – the length of daylight is equal to the length of night.”
— APOD editors, September 23, 1999
Read the full explanation on science.nasa.gov
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At a glance
- Date
- September 23, 1999
- Type
- Image
- Credit
- Credit: SOHO – EIT Consortium, ESA, NASA
- Copyright
- No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
- Explanation length
- About 117 words