The UV Index measures the ultraviolet radiation coming from the sun. There are three primary types of UV radiation: ...

Our Earth is structured sort of like an onion – it’s one layer after another. Starting from the top down, there’s the crust, which includes the surface you walk on; then farther down, the mantle, ...

The sun is in its most active phase—solar summer—causing auroras and posing real risks to satellites, GPS, and power systems ...

The color of the sun is actually white, though it may look yellow. If you were to get close enough to the sun, which you can't actually do, you'd be able to see its true color. The light rays from the ...

Solar expert Dr. Ryan French explains how to safely photograph the sun and all of its stellar features with the use of cameras, lenses, telescopes and filters. As we all learn from a young age, the ...

Space seems like it should be blazing hot with the Sun shining nonstop, yet astronauts and spacecraft deal with freezing cold. The reality is more complicated than distance alone because how heat ...