Almost 20 years after Pluto was infamously downgraded from its status as a planet, scientists now believe they have ...

But the heavenly body – possibly a dwarf planet à la Pluto – isn't a frequent visitor. Located beyond Neptune, its extreme orbit circumnavigates the sun once every 25,000 years, taking it ...

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.

2017 OF201 is a roughly spherical body about 435 miles (700 kilometers) in diameter, lurking beyond Neptune's orbit. A team of ... as its fellow dwarf planet Pluto. Based on the newfound object's ...

This means that it orbits the Sun further away than Neptune. Actually ... and it indicates just how big this TNO’s orbit is. With a diameter a third of Pluto's, it is incredible that it has ...

The TNO is potentially large enough to qualify as a dwarf planet, the same category as the much more well-known Pluto ... orbit the sun at a greater average distance than the orbit of Neptune.

Astronomers have identified a new trans-Neptunian object, 2017 OF201, located far beyond Pluto ... perspective, Neptune orbits at approximately 30 AU. This enormous elliptical orbit makes 2017 ...

The discovery has significant consequences for the understanding of those areas in the solar system behind the orbit of Neptune. Until now, it had been assumed that although the Kuiper Belt exists ...

For decades, it captivated imaginations with its icy surface and distant orbit beyond Neptune. But in 2006, Pluto’s planetary ...