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

The autumn equinox takes place at 19:20 BST Monday – marking the point when the sun appears to shine directly over the equator. This annual astronomical milestone officially heralds the arrival of ...

WITH colder weather on the horizon and energy bills set to rise again, preparing your home for winter has never been more ...

Sometimes called a “pulse oximeter,” it works by shining red and near-infrared light into your wrist, from just under the ...

Solar activity has been on an overall decline since the ‘80s and scientists were expecting us to plunge into a historic low ...

“We were excited by recent discoveries that a process called magnetic reconnection heats ions 6.5 times as much as electrons, ...

The official number of exoplanets—planets outside our solar system—tracked by NASA has reached 6,000. Confirmed planets are ...

After solar activity spent several decades on the decrease, the number of sunspots, flares and coronal mass ejections is once ...

The Sun seems like a constant, reassuring presence day to day, but it's actually fairly tempestuous and changeable. One ...

“All signs were pointing to the Sun going into a prolonged phase of low activity,” said Jamie Jasinski, study lead author and ...