Astronomy Picture of the Day ·

Sigmoids Predict Solar Eruptions

The Astronomy Picture of the Day for March 16, 1999 is “Sigmoids Predict Solar Eruptions,” an image. It is credited to Credit: Yohkoh Project, SXT Group, NASA, ISAS. The original explanation runs about 134 words.

Sigmoids Predict Solar Eruptions
Credit: Yohkoh Project, SXT Group, NASA, ISAS Shown from science.nasa.gov. Not hosted by OpenOrbit.

From the explanation

“On the Sun , S marks the spot. Solar explosions have been discovered to explode preferentially from regions marked with this letter.”

— APOD editors, March 16, 1999

Read the full explanation on science.nasa.gov

At a glance

Date
March 16, 1999
Type
Image
Credit
Credit: Yohkoh Project, SXT Group, NASA, ISAS
Copyright
No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length
About 134 words

All of March 1999 → · 1999 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: March 16 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.