The James Webb Space Telescope (JWST) has discovered that a hazy sky over frozen Pluto is helping to cool the dwarf planet's ...

OF201, the object belongs to the same all-star family as Pluto: dwarf planets. Its diameter, roughly 435 miles (700 km), is ...

Many people hold Pluto close in their hearts and refuse to abandon the assertion that it is a planet, although science doesn't see it that way.

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Earth has a newly-discovered neighbor in the solar system. But the heavenly body – possibly a dwarf planet à la Pluto – isn't a frequent visitor. Located beyond Neptune, its extreme orbit ...

Gravity typically pulls objects into more ... Instead of a tiny, icy Pluto, Planet Nine would be a true giant lurking at the solar system's edge. Finding it would also reshape our understanding ...

Based on the newfound object's trajectory, the scientists estimate its last close pass to the sun was in 1930, the same year Pluto was ... the influence of Planet 9's gravity to explain the ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

“Meanwhile, its perihelion—the closest point on its orbit to the Sun—is 44.5 times that of the Earth’s orbit, similar to Pluto's orbit.” The International Astronomical Union determined in 2006 that to ...

As it orbits the sun once every 25,000 years, the celestial body 2017 OF201 travels beyond the Kuiper Belt into a region thought to be largely devoid of objects ...