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

Cheng, together with graduate students from Princeton University, discovered the potential dwarf planet while searching for ...

Astronomers have discovered a mysterious dwarf planet, 2017 OF201, far beyond Pluto. This discovery challenges existing ...

Scientists have discovered a mysterious new object far beyond Neptune, and it could be one of the most distant dwarf planets ...

Early in the morning on July 14, I was at the Applied Physics Laboratory in Maryland when NASA released the now-iconic image of Pluto and its big, bright heart. Serendipitously, I happened to be ...

In the cold, distant reaches of the Solar System, far beyond Pluto, astronomers have just identified what could be a new ...

Scientists have found a new world orbiting the Sun two billion miles beyond Pluto, which had been the most distant known planet. <div class="section1"><div class ...

New Horizons traveled over 3 billion miles and almost 10 years until it finally reached Pluto. If you think that's impressive, get ready for the spacecraft's next target. New Horizons is going even ...

It will be humanity's most distant exploration of a celestial body, 4 billion miles (6.4 billion kilometers) from Earth and 1 billion miles (1.6 billion kilometers) beyond Pluto. New Horizons in ...