The sun isn’t the only light source behind that summer tan
Tiny amount of ultraviolet light comes from the Big Bang and other stars, galaxies
![Milky Way Galaxy](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/09/091516_cc_suntan-stat_free.jpg?fit=860%2C460&ssl=1)
CATCHING SOME GALACTIC RAYS Galaxies, such as those in this image from the Paranal Observatory in Chile, are responsible for less than one-billionth of 1 percent of your suntan. The bright blue-white points of light in this picture are stars in the Milky Way; most other objects are galaxies.
ESO/UltraVISTA team