Astronomy Picture of the Day · February 17, 2011

X-Class Flare

The Astronomy Picture of the Day for February 17, 2011 is “X-Class Flare,” an image. It is credited to Credit: NASA / Goddard / SDO AIA Team. The original explanation runs about 109 words.

From the explanation

“On Valentine’s Day (ET) the Sun unleashed one of its most powerful explosions, an X-class flare . The blast was the largest so far in the new solar cycle.”

— APOD editors, February 17, 2011

Read the full explanation on science.nasa.gov

At a glance

Date: February 17, 2011
Type: Image
Credit: Credit: NASA / Goddard / SDO AIA Team
Copyright: No copyright notice on the entry. Check the credited institution’s own usage rules before reusing it.
Explanation length: About 109 words

All of February 2011 → · 2011 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: February 17 in other years

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Source

Astronomy Picture of the Day, February 17, 2011 — science.nasa.gov/image-article/apod-2011-february-17-x-class-flare

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.