Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. A partial solar ...

Sun illuminates Norway and Iceland during summer. The sun stays visible even at midnight. Towns like Tromso and Akureyri ...

Each letter represents a 10-fold increase in energy released by the sun over the previous class, according to NASA. In addition to the letters, scientists also use a scale from 1 to 9 to describe ...

This space weather alert is tied to a rare solar double feature: two magnetic filament eruptions that launched CMEs from the Sun over the weekend. If both CMEs arrive on Earth close together ...