Astronomers find a star that would glow ghostly green

No star should be green — and almost none is. But University of Warwick astronomers led by Dr Mark Hollands have calculated that the white dwarf WD J1330+6435, a stellar ember about 4,000°C littered with sodium, calcium and lithium from rocky debris it has swallowed, would appear chartreuse green to the human eye: its sodium drinks in the orange light, leaving the ghostly green behind. Surveying 151 white dwarfs within 65 light-years for a study in RAS Techniques and Instruments, the team found about one in thirty wears an unusual colour — pink and purple ones included. Green, though, stands alone.