A volunteer citizen scientist working with a NASA project has found the coldest, oldest-known white dwarf, and it's surrounded by rings of dust and debris, according to a study published Tuesday in The Astrophysical Journal Letters. Researchers believe it may be the first white dwarf known to have multiple rings.
원문출처 : https://www.cnn.com/2019/02/19/world/white-dwarf-rings-discovery/index.html
원문출처 : https://www.cnn.com/2019/02/19/world/white-dwarf-rings-discovery/index.html