For decades, we believed there were nine planets in our solar system—until Pluto was reclassified in 2006. But what if ...

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” ...

The Planet Nine theory was based on several trans-Neptunian objects, those that are beyond the eighth planet, with highly “tilted” orbits compared to the ecliptic plane. This seemed odd and ...

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

Speculation swirls as scientists debate if Planet Nine is a celestial body or something darker. Clues emerge from unexplained gravitational anomalies far beyond Neptune. A radical hypothesis ...

Have you ever wondered what it takes to journey to Mars? A one-way trip to the Red Planet would take nine months but a return journey would be around three years. While these estimates provide a ...