Atomic Number: 76 Atomic Symbol: Os Atomic Weight: 190.23 Melting Point: 5,491.4 F (3,033 C) Boiling Point: 9,053.6 F (5,012 C) Word origin: Osmium comes from the Greek term osme, which means ...

White dwarfs typically have hydrogen and helium in their atmospheres, and heavier elements like oxygen, neon, and magnesium are found in a pool of these light elements. Also, stars that have these ...

Using this data, the researchers found that one particular white dwarf, with the eloquent name ­­SDSS J124043.01+671034.68, ... making oxygen the lightest element in the star’s atmosphere.

But a newly discovered white dwarf, about 1,200 light-years away in the constellation Draco, has no hydrogen or helium at its surface. Its atmosphere is instead dominated by oxygen , researchers ...