219 Hour image of M81 & M82 (+ 21cm HI)

[Knight of Clear Skies]

This is well worth a look, an ultra-deep image of these interacting galaxies:

https://theastroenthusiast.com/the-interacting-triplet-of-m81-m82-and-ngc-3077-an-ultra-deep-219-hour-collaboration-detailing-the-nuanced-interaction-remnants-and-galactic-cirrus/

But what makes it interesting is that the page has a version with HI radio data added, which shows the gas bridges between the galaxies in blue.

This could be useful for distinguishing IFN from faint tidal bridges.

[impactcrater]

Something cooked up by Rick Stein !

[CCD-Freak]

WOW !!!!!

 

That is the definition of "going deep".