Sol (Sun) and its phenomena

[Olivierlejardinier]

There's still farside flaring, it will take about 8 days for AR4274 to return.

There was a full-halo CME this evening (UTC), apparently coming from a far side source. From the geometry of the CME it looks like the source region might be in the northern hemisphere, close to the far side central meridian - possibly 4274.

https://twitter.com/x/status/1992017874345673042

From spaceweather.com, 3I/ATLAS behaving like a normal comet, still discharging the solar capacitor:

INTERSTELLAR COMET 3I/ATLAS IN COLOR: Who needs satellites and space agencies? Using a backyard telescope on Earth, amateur astronomers Michael Jäger and Gerald Rhemann have just captured the best-yet color image of interstellar visitor 3I/ATLAS. It is unmistakably a comet.​

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With one exception (discussed below), the photo is "classic comet." The comet's long tail streams straight away from the sun, sculpted by solar wind. Its blue color comes from carbon monoxide ions, CO+, a compound found in almost all Solar System comets. The comet's head is green because of another common molecule, diatomic carbon (C2), which is released from icy comet cores when they get close to the sun.


Now for the exception: There is a jet poking out of 3I/ATLAS's head toward the sun. It stands out in this black-and-white image taken by Michael Jäger and Gerald Rhemann on Nov. 20th:

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