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 object’s aphelion the farthest point on the orbit from the Sun is more than 1,600 times that of the Earth’s orbit,” said ...

The object’s aphelion—the farthest point on the orbit from the sun—is more than 1,600 times that of Earth’s orbit,” Institute ...

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

As it orbits the sun once every 25,000 years, the celestial body 2017 OF201 travels beyond the Kuiper Belt into a region ...

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system.

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.

The plains house the aptly named Very Large Array (VLA)—a radio telescope made of 27 different antennas, each of which looks ...

For years, astronomers have been searching for a ninth planet in our solar system (after giving Pluto ... “All those people who are mad that Pluto is no longer a planet can be thrilled to ...

"For the first time in over 150 years, there is solid evidence that the solar system's planetary census is incomplete." No observational evidence for Planet Nine has been found, although this is ...

an astrophysicist with Aarhus University who had no role in the new study. Probing these wacky celestial bodies can help us understand how conditions beyond our solar system may yield planets ...