The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

People always want to know what will happen to Earth when the sun eventually swells up as a red giant. For one thing, the ...

Incredible new images of the sun's surface provide an unprecedented view of sunspots and other solar activity.

The sun's corona—the outermost layer of its atmosphere, visible only during a total solar eclipse—has long intrigued ...

Cheng discovered the object as part of an ongoing research project to identify TNOs and possible new planets in the outer ...

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

Scientists have identified an object about 435 miles (700 km) wide inhabiting the frigid outer reaches of our solar system that might qualify as a dwarf planet, spotting it as it travels on a highly ...

The curious minds at What If speculate on the catastrophic destruction of our solar system if a rogue star collides with the ...

Using a newly developed adaptive optics system called Cona, scientists peered through Earth's turbulent air to reveal the sun ...

But this assumes that nothing affects the Solar System in the meantime, and that is not a certainty. As we travel around the ...

A rather new adaptive optics system dubbed Cona has just opened a new window into the mysterious world of the Sun's corona, ...

A new 8K camera system at the Vacuum Tower Telescope in Tenerife captures images of the Sun's surface in stunning detail.