Newfound gas cloud may be graveyard of first stars
Scarcity of heavy elements points to universe’s earliest stellar inhabitants
ELEMENTAL DIVERSITY Explosions of first-generation stars (one simulated here) produced elements heavier than helium and spread them throughout the cosmos. A newly discovered gas cloud may hold the signature of these ancient explosions. The densest gas in this explosion is shown in red.
B. Smith et al/arXiv.org 2015