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Astrophysica

thephysicsjournal.substack.com

did:plc:hzarqdde3dfyj53yfhua4o5x

Copelandʼs Septet, a group of seven galaxies located about 480 million lightyears away in the constellation Leo. (KPNO/NOIRLab/NSF/AURA/Neil Jacobstein/Adam Block)

2026-02-19T10:22:38.552Z