“Astronomers Discover First Green Star: WD J1330+6435 Challenges Stellar Color Theory” — what this page in the network covers. Astronomers have identified the first star that appears green to the human eye, a white dwarf cataloged as WD J1330+6435. Located in the constellation Draco, this stellar remnant is roughly 100 light-years away and has an effective temperature of about 40,000 Kelvin. Its unusual green hue stems from a rare combination of strong hydrogen absorption lines that suppress blue and red light, allowing green wavelengths to dominate—a phenomenon never before observed in a star.
The discovery, featured on NASA's Astronomy Picture of the Day, was made using data from the Sloan Digital Sky Survey and follow-up observations with the Hubble Space Telescope. This finding matters because it defies the long-held assumption that stars cannot appear green due to the physics of blackbody radiation. For the complete material, the listing points back to the source inside the network.