A new study co-led by the Smithsonian and the University of Arizona offers the most detailed glimpse yet of how Earth’s ...

A new study co-led by the Smithsonian and the University of Arizona offers the most detailed glimpse yet of how Earth's ...

Astronomers developed a technique that uses a star's spectrum to chart variations in its temperature to the nearest tenth of ...

Astronomers study stars by looking at the different colors of light they emit—colors they capture and analyze using ...

Red supergiant Betelgeuse, with a surface temperature of 3,700 kelvins (6,200 F [3,400 C]), peaks in the red and appears ...