A team of astronomers led by Dr. Souza Oliveira Kepler from the Federal University of Rio Grande do Sul, Brazil, is reporting the discovery of a white dwarf with an atmosphere completely dominated by oxygen, SDSS J124043.01+671034.68 (SDSS J1240+6710 for short). SDSS J1240+6710 (arrow). Image credit: S.O. Kepler et al / Sloan Digital Sky Survey. Stars born with masses below 8 to 11 solar masses end their lives as small, hot, and extremely dense objects...
