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During today's #Bochum #sunset the big #sunspot (1)4482 was seen in the lower right while at "10 o'clock" - above the church spire - the new group (1)4489 has just appeared on the disk. Later timestep:
#sunspot
7 posts · Last used Jul 13
RE: https://mastodon.social/@PlanetariumBochum/116813523474807512
The #Bochum #sunset on 25 June, with several #sunspot groups - AR 4478 at 10 o'clock:
Quoting
Mehrere Fleckengruppen waren gestern auf der untergehenden #Sonne zu sehen, darunter die gerade auf die Vorderseite rotierte 4478, die in https://skyweek.wordpress.com/2026/06/16/allgemeines-live-blog-ab-dem-16-juni-2026 ("Eine neue große Gruppe ist heute auf der Scheibe aufgetaucht ...") vorgestellt wurde. Und in https://bsky.app/profile/planetariumbochum.bsky.social/post/3mp5npxkzks2v gibt es vier weitere Zeitschritte des Untergangs, nunmehr weit rechts vom Extenterhaus.
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The #sunspot-littered #Sun at 14:42 UTC today, taken with a #BridgeCamera at high (slightly digital) zoom through old aluminized-mylar eclipse glasses: four of the 6 current groups - https://spaceweather.com/images2026/29jun26/hmi1898.gif - are easily seen, big 4478 and 4479 well resolved into umbra and penumbra and small 4480 and 4475.
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The two big #sunspot groups today around 15:00 UTC, taken with a #BridgeCamera: see https://skyweek.wordpress.com/2026/06/28/allgemeines-live-blog-ab-dem-28-juni-2026/#Jul01 for the exact technical data.
#AR4478: Giant #Sunspot Group
#Astronomy #Picture of the Day
https://apod.nasa.gov/apod/ap260628.html
#APOD #Sun
🚨 BIG SUNSPOT ALERT 🚨
Sunspot 4366 didn’t exist days ago—now it’s nearly 10× wider than Earth and already fired off a triple-peaked M7–X1–M6 solar flare lasting over 6 hours. Its unstable magnetic field means more flares are likely. A radio blackout followed… and space weather may not be done yet.
Track it live: https://spaceweather.com/
#Sunspot #SolarFlare #SpaceWeather #Sunspot4366 #XClassFlare #Astronomy
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