SDSS J1038+4849
Galaxy cluster in the constellation Ursa Major
SDSS J1038+4849
SDSS J1038+4849 is a galaxy cluster 4.5 billion light-years away in the constellation Ursa Major, famous for its appearance as a smiley face. The yellow eyes and white nose are distant galaxies, while the Einstein ring-forming smile and border are caused by gravitational lensing.
Read on Wikipedia · Image NASA/ESA, Public domain
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