Astronomy Picture of the Day Showcases Three Distinct Galaxy Pairings

Today's Astronomy Picture of the Day presents three distinct galaxy pairings. At the top, NGC 4650A exhibits a striking blue polar ring, hinting at a past galactic collision, while its neighboring galaxy shows no signs of current interaction. The middle duo features NGC 4650, a bright barred spiral galaxy, and a second galaxy whose speed makes a gravitational link unlikely.

The bottom pair, NGC 4622A and NGC 4622B, are actively interacting and are projected to merge into one galaxy roughly a billion years from now. All three systems are likely members of the Centaurus Galaxy Cluster. The image and description were prepared by astronomer Rafael Sampaio and edited by Robert Nemiroff, Jerry Bonnell, Cecilia Chirenti, and Keighley Rockcliffe. The APOD service is provided by ASD at NASA/GSFC, NASA Science Activation, and Michigan Tech University.