VV 689 used to be a pair of spiral galaxies. Not any more.
My first reaction to the shape was something like a tulip bulb. Noticed the blue immediately striking an beautiful. Speaking of alien skies, that would be an interesting sky to be under.
At fiorst glance it kind of looks like some sort of protozoan, along the lines of a euglena (only it has but a single cilium), but second reaction was of a squid (I'm partial to octopuses - or octopodes, if you prefer, but this is definitely Squidward-like). And tremendously beautiful! What is that "aertifact" in the tentacle of the merged galaxy on the right, in the middle of all that blue? Looks lke a bg chunk of one of the galaxies got flung out with the gas and dust.
That is one beautiful image, isn't it?!?
(BTW, apropos of nothing... my favorite sentence so far in Under Alien Skies: "Neptune was the first planet ever discovered using math, but Pluto was the only planet ever found by mistake." That's a pretty finely balanced bit of wordsmithing, Phil! 👍)