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Credit & Copyright: Jürg Alean
Explanation:
Sunsets may be the
most watched celestial event,
but lately sunsets have even offered something
extra.
A sunspot so large it was visible to the naked eye is
captured in Swiss skies in this sunset scene from January 5,
crossing left to right near the center of a solar disk
dimmed
and distorted by Earth's dense atomosphere.
Detailed views reveal a large
solar active region composed of sunspots, some
larger than planet Earth itself.
Cataloged as active region AR 1944,
on January 7
it produced a substantial solar flare and a
coronal mass ejection (CME)
forecast to reach Earth.
The CME could trigger
geomagnetic storms and aurora on
January 9.
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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: Sun - sunspot
Publications with words: Sun - sunspot
See also:
- APOD: 2024 February 19 Á Looking Sideways from the Parker Solar Probe
- Circling the Sun
- APOD: 2023 December 11 Á Solar Minimum versus Solar Maximum
- APOD: 2023 November 19 Á Space Station, Solar Prominences, Sun
- APOD: 2023 October 25 Á Gone in 60 Seconds: A Green Flash Sunset
- Circular Sun Halo
- APOD: 2023 August 1 Á Monster Solar Prominence