The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

However, this year a powerful new telescope is coming online that could prove once and for all that there really is a ninth planet in our Solar System. The same year that Pluto was ignominiously ...

For many years scientists have been wondering if a mysterious ninth planet lurks in our Solar system. “Planet Nine”, dubbed, has fascinated scientists for its ability to account for “anomalous” ...

Scientists at NASA for the first time have been able to observe the make up of Pluto and other small and icy celestial bodies ...

For decades, Pluto was celebrated as the ninth planet of our solar system. However, in 2006, the International Astronomical Union (IAU) redefined what constitutes a planet, leading to Pluto’s ...

The universe's unexplained phenomena, such as mysterious signals and invisible matter, challenge scientists to uncover deep cosmic secrets.

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its status as the ninth planet in our Solar System. From that day forward ...