OF201 is incredibly lightweight on a cosmic scale. Scientists estimate its mass is about 20,000 times less than Earth’s and ...

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 International Astronomical Union’s Minor Planet Center, which catalogs new moons and other small bodies in the solar ...

Star TOI-6894 is just like many in our galaxy, a small red dwarf, and only ~20% of the mass of our sun. Like many small stars ...

The discovery of the exoplanet, a super-Earth called Kepler-735c, is all down to something called transit timing variations, ...

others the size of a house, and a few as big as a planet. This process, called accretion, is how everything in the solar system – planets, moons, comets and asteroids – came into being.

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

Some became rocks the size of baseballs, others the size of a house, and a few as big as a planet. This process, called accretion, is how everything in the solar system – planets, moons, comets and ...

On May 21, the International Astronomical Union's Minor Planet Center announced the discovery of 2017 OF201, which, because of its distance beyond Neptune, is classified as a trans-Neptunian object ...

This is an image of Ceres, the nearest dwarf planet to Earth in the solar system. A new dwarf planet ... 25,000 Earth-years to complete. For comparison, Pluto makes a lap around the sun every ...

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system. The object—which orbits out beyond Neptune—has been named "2017 OF201" by the ...

A recently discovered celestial body is rewriting our knowledge of the Kuiper Belt and maybe challenging the existence of the ...