The idea of an additional planet was first proposed in the 19th century when Neptune’s orbit seemed perturbed ... explaining the tilted axial rotation of the Sun and peculiar orbits of certain ...

Scientists using a telescope in Hawaii have discovered a never-before-seen dwarf planet lurking within the ring of icy bodies beyond the orbit of Neptune. The small new world -- temporarily named ...

The alignment will involve Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune appearing in an ... has a different timeframe for complete rotation around the sun so all of them coming ...