Latest Space Breaking News: Astronomers discover two more double-faced white dwarfs

Link: https://phys.org/news/2025-04-astronomers-white-dwarfs.html

Summary: For many years it was believed that the surface of most, if not all, white dwarfs was made up primarily of hydrogen. But then, two years ago, a white dwarf was spotted by a team of researchers that had a hydrogen surface on one side and a helium surface on the other. Since then, five more of the stars have been found, including two new ones by a team working in Oklahoma.