Astronomers from Turkey and Japan have performed optical observations of a recently discovered nearby supernova remnant known ...

Studies by the Nearby Supernova Factory of its colors and spectrum as they evolved over time have produced a benchmark atlas of data by which to measure all future Type Ia's.

The paper is titled "Life in the Bubble: How a nearby supernova left ephemeral footprints on the cosmic-ray spectrum and indelible imprints on life," and it is available on the arXiv preprint server.