Great example of what ALMA can do
30 milli-arcsecond resolution of 1mm wavelengths is very impressive. That's better that Hubble's highest resolution, as I understand it, and of course Hubble has no instruments that can see at 1mm wavelengths.
In effect, the closer elliptical galaxy is the objective lens of a really big refracting telescope, and ALMA is the eyepiece. Too bad we can't point it in a different direction.