The remnants of an exploded white dwarf star are serving as a learning tool for astronomers. The supernova remnant, known as SNR 0519-69.0 (SNR 0519 for short) is the result of debris from a white dwarf star explosion.

It is believed that the dwarf star in question reached a critical mass, “either by pulling matter from a companion star

Source: Hot Hardware – How NASA’s Stunning Supernova Photo Might Help Predict When A Star Is On Death’s Doorstep