Long before humans walked the Earth, your solar system had a brush with two blazing blue stars that passed surprisingly close ...

The sun’s outer atmosphere resembles a pufferfish.

Our Sun’s outer atmosphere, the corona, is millions of degrees hotter than it should be, and no one knows why.

At times, the sun ejects energetic material into space, which can have consequences for space-based and even ground-based ...

How big it is: 865,000 miles (1.392 million kilometers) across How far away it is: 93 million miles (150 million km) What type of star it is: A yellow dwarf star The sun is the star at the center of ...

At the ragged frontier where the Sun’s influence gives way to the galaxy, a decades‑old spacecraft has stumbled into a ...

Earth is the only life-supporting planet in our Solar System. Until now. Today, we’re bringing Kepler 22-b into our planetary ...

At the farthest edge of the Sun’s influence, the Voyager probes have stumbled into something that sounds almost mythic: a sheath of gas heated to tens of thousands of degrees, a kind of invisible ...