Is this a merging galaxy?
Is this two galaxies merging or is the lower one a star?
by Budgieye moderator
The big one is closer to us than it is to the one below. So not a merger, but a possible useful overlap.
z 0.072 0.00002 Well, the bigger galaxy has an exact redshift in SkyServer.
z 0.20 zErr 0.02 The little galaxy has an estimated redshift, and is much much further away. It is more orange in Skyserver
Using this handy calculator
The distance away
950 million light-years for the closer one.
2420 million light-years for the more distant one.
So the big one is closer to us than it is to the one below.