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Messier 61 - Wikipedia
Messier 61 - NASA Science
Messier 61 - Messier Objects
Hubble View: A Hungry Starburst Galaxy - NASA Science
Messier 61 looks straight into the camera - ESA/Hubble
Messier 61- the NGC 4303 Barred Spiral Galaxy - Universe Today
Messier 61 (Roberto Marinoni) - AstroBin
APOD: 2019 August 28 - Messier 61 Close Up - Astronomy Picture of the Day
Messier 61 (Swelling Spiral) - Spiral Galaxy in Virgo - TheSkyLive
Messier 61 - M61 - AstroPixels