Artist’s impression of dust formation by supernovae in A2744_YD4

This artist’s impression shows what the very distant young galaxy A2744_YD4 might look like and how supernovae explosions, the deaths of very massive and brilliant stars, polluted it with dust.. ALMA observations of this galaxy, seen when the Universe was just 4% of its current age, are providing insights into the birth and explosive deaths of the very first stars in the Universe.