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

Simulations show that the stars’ tug could send Mercury, Venus or Mars crashing into Earth — or let Jupiter eject our world from the solar system.

Tianwen, which means "questions to heaven," is the name given to China's program of robotic Solar System exploration. Tianwen ...

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

China has launched an ambitious mission to study two intriguing objects in our solar system, the likes of which have never been visited by a spacecraft before. The Tianwen-2 mission launched aboard a ...

Researchers from Rice University claim to have fresh evidence of Planet Nine - as well as a method to find it.

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

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

At the very edge of our solar system, beyond the grasp of Neptune and even past the icy sprawl of Pluto’s domain, a new ...

To better understand Jupiter’s primordial stages, researchers turned to the tiniest of the planet’s 92 known moons. Almathea ...

PUNCH’s vibrant first images reveal the solar wind in a whole new light — literally. This ambitious NASA mission is set to capture the Sun’s outer layers in 3D for the first time.

“This hypothetical Neptune-sized planet would circle our Sun on a highly elongated ... giving a better glimpse into what lies at the edge of our solar system. The Vera C. Rubin Observatory ...