Learn how a possible ninth planet, the theoretical Planet X, could have acquired its wide orbit in the outer Solar System — a ...

Oumuamua is the first known interstellar object to enter our solar system, sparking debate with its strange shape, speed, and ...

Researchers Nathan A. Kaib and Sean N. Raymond assessed the impact of passing stars on the long-term stability of the Solar ...

Researchers Nathan A. Kaib and Sean N. Raymond assessed the impact of passing stars on the long-term stability of the solar ...

Since the corona is dimmer than the Sun's surface, it's challenging to observe. It's visible during total solar eclipses when ...

It’s possible that this object was first ejected to the Oort cloud, the most distant region in our solar system, which is home to many comets, and then sent back,” Cheng adds. The size of 2017 ...

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

A new memorandum has firmed up China and Russia's intent to lead the construction of a new lunar base to be completed by 2036, as NASA talks about scaling back its own lunar ambitions.

In the cold, dark outskirts of planetary systems far beyond the reach of the known planets, mysterious gas giants and ...

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

You can get in touch with Alyce by emailing a.collins@newsweek.com A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system.

A powerful new optics system has captured the clearest view yet of the Sun’s corona, revealing stunning plasma structures.