Evolution of an unusual monster galaxy

XMM-2599 lived fast and died young in the very early Universe.

The possible evolution of XMM-2599 (L to r) from a massive, dusty, star-forming galaxy, to an inactive red galaxy, and then perhaps a bright cluster galaxy. Credit: NRAO/AUI/NSF, B. SAXTON; NASA/ESA/R. FOLEY; NASA/ESA/STSCI, M. POSTMAN/CLASH