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2. "SWAN" turns up in many comet names, after the instrument that has detected them

Wed Sep 24, 2025, 12:21 PM

Sep 24

https://en.wikipedia.org/wiki/Comet_SWAN
https://en.wikipedia.org/wiki/Solar_and_Heliospheric_Observatory#Instruments
(just as "ATLAS" is also the name of an instrument)

I guess this is the one you'd read about - reached peak brightness from Earth on 16th Sept:
https://en.wikipedia.org/wiki/C/2025_R2_%28SWAN%29
No idea where "100 time the size" comes from. Size of the nucleus? Of the coma or tail? Something to do with apparent magnitude, ie brightness as seen from Earth, perhaps? 3I/ATLAS won't be visible to the naked eye:
https://en.wikipedia.org/wiki/3I/ATLAS says "300 times fainter than comet C/2025 R2 (SWAN)" on 21st Sept.

Did the Mars info come from the Pole Corter observatory?

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Highlight:

What is the latest official word on 3I/ATLAS ? [View all] kentuck Sep 24 OP

I also read about a storm of 755 objects WhiteTara Sep 24 #1

Official word - Beware of AI Slop. haele Sep 24 #3

Nothing strange about 3I/ATLAS HBguy Sep 24 #4

Thanks HBguy! kentuck Sep 24 #5

Thanks! HBguy Sep 24 #7

It's SMOD, the Sweet Meteor Of Death Wicked Blue Sep 24 #6

. bigtree Sep 24 #8

Sadly, there is an abundance of bullshit being generated MineralMan Sep 24 #9

The latest word is silence Polybius Saturday #10