WASHINGTON (Reuters) -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 ...

Not long ago, the idea of mining in space sounded like something out of a sci-fi novel. But today, it’s a field that ...

As the bright star Regulus and the Beehive Cluster shine close by. The moon will appear to skip over Mars between the nights ...

Plane X would have a 'mass of about five Earths', an expert told Metro.

In an interview, the scientist talks about reviewing the science of movies ahead of his appearance at the Luther Burbank ...

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 ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system's outer reaches.

After surviving the extreme, long-haul journey, you'd next have to navigate all 13 of Uranus' dusty rings - a bit like a spy ...

But new research from the University of Chicago is urging caution. After analyzing data from multiple observations of the ...

Our solar system’s origin story spans billions of years and involves clouds of gas, cosmic collisions, and planetary ...

A new analysis of planet formation models estimates the odds of a theoretical Planet Nine orbiting our sun at 40% given ...