Researchers have used a mathematical model that allows them to get a clearer picture of the galaxy’s youngest supernova remnant (dubbed G1.9+0.3) by correcting for the distortions caused by cosmic dust. Their new data provides evidence that this remnant is from a type Ia supernova — the explosion of a white dwarf star — and raises questions about the ways in which magnetic fields affect the generation of the remnant’s cosmic ray particles.