Since it's getting misreported everywhere: this image of the stellar stream of the #galaxy #Messier61 by #Rubin - from A #StellarStream around the Spiral Galaxy Messier 61 in Rubin First Look Imaging: https://iopscience.iop.org/article/10.3847/2515-5172/ae1829 - is the *best* but not the first. For it had already been imaged, often clearly, by #AmateurAstronomers in 2020, 2024 and earlier in 2025: https://www.flickr.com/photos/133259498@N05/50665292533/ and https://www.galactic-hunter.com/post/messier-61-astrophotography and https://app.astrobin.com/i/0az5qv and https://app.astrobin.com/i/ldptvo - and these are just the results I could track down easily.