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11 comments
Matthias Steinmetz

@StoffFaser @nbatalha

The lower one, the lower left one (which is two galaxies interacting) and the upper left one are close to each other, i.e. members of a group, while the blue one on the upper right is way in the foreground and physically unrelated to the other ones.

StoffFaser

@GalacticRAVE @nbatalha okay yes at a closer look that makes sense from the appearing sizes. does the color tell something about the Distance too?

Matthias Steinmetz

@StoffFaser @nbatalha not for those distances, for much larger ones that would be an effect. Here the color is mainly how active a galaxy was in the โ€žrecentโ€œ past in forming stars, blue meaning more young (massive) stars. Dust also plays a role (turning objects reddish when you look through dust - thatโ€˜s also why sunsets are red).

Zem ๐Ÿ‡ช๐Ÿ‡น ๐Ÿ‡ช๐Ÿ‡บ

@GalacticRAVE impressive๐Ÿ‘ thanks for sharing ๐Ÿ˜€ I am impress that we can see so much from ๐ŸŒŽ

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