#sunspot

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: https://bsky.app/profile/cosmos4u.bsky.social/post/3mqkjezmlp22g

RE: https://mastodon.social/@PlanetariumBochum/116813523474807512 The #Bochum #sunset on 25 June, with several #sunspot groups - AR 4478 at 10 o'clock: https://bsky.app/profile/vincentledvina.bsky.social/post/3mp4yl543zs2z

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.

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.

The two #sunspot groups 4478 (below) and 4479 right after #sunrise in #Bochum, Germany, minutes ago - two further timesteps in https://bsky.app/profile/cosmos4u.bsky.social/post/3mpn3yanylk2e

#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