Temperature, Brightness, and Color of the First Stars
Release Date: February 22, 2019 12:00PM (EST)
Media Use: Copyright
2016 X 1111 JPEG 449 KB
About This Image
Massive Population III stars could have been as hot as 100,000 kelvin—more than 90,000 degrees hotter than the Sun. The hotter any object is, the more electromagnetic radiation (light) it gives off, and the higher energy the radiation is. Population III stars would have been much brighter than the Sun, giving off mostly high-energy ultraviolet rather than visible light.