Mercury passes perihelion today at 0.3075 AU from the Sun, and exits SOHO’s outer LASCO C3 field of view stage left; the hunt is now on to catch the innermost world low to the east at dawn, for its final apparition for 2025.

Wow. Michael Jaeger posted this amazing fragmentation sequence of Comet C/2025 K1 ATLAS on Nov 20. Currently a month and a half past perihelion on October 8th, K1 ATLAS is a +10th magnitude comet now on its path outbound through the constellation Ursa Major. spaceweathergallery2.com/indiv_upload...

Tonight: Io and Callisto both cast shadows on the cloud tops of Jupiter. The double-shadow event begins when 1:30 Universal Time (UT) when Io’s shadow joins Callisto’s, and ends when Io’s shadow quits Jove at 3:50 UT.

The recent fragmation sequence seen here of Comet K1 ATLAS is pretty amazing -
www.virtualtelescope.eu/2025/11/13/c... -Courtesy of astronomer Gianluca Masi

They did it: New Glenn's booster is back on Jacklyn:

The cascade of energetic protons also kicked off a ground level event, still underway this AM. You can see how the hail of energetic particles temporarily blinded SOHO’s LASCO C3 imager:

Clearly, while massive sunspot group AR 4274 is now rotating away from us, it ain’t done with us yet.