Astronomers believe they have documented a cosmic beginning: a star that appears green to the human eye. Located 280 light-years from Earth, the white dwarf's unusual hue is due to the absorption of rocky debris from its former planetary system.

Astronomers believe they have documented a cosmic beginning: a star that appears green to the human eye. Located 280 light-years from Earth, the white dwarf's unusual hue is due to the absorption of rocky debris from its former planetary system.