Almost 7,000 astronomical units – – to the sun from Earth Scientists have discovered a planet, which is about 600 billion miles from its star, or about 7000 times the distance found is the distance between planet and star this would be the largest solar installation, each be discovered – dwarfing the likes of Neptune, only 30 AU from the Sun and Pluto, which is 40 AU.. An exoplanet that is nearly fifteen times heavier than the mass of Jupiter is orbiting its host star at the astonishing distance of around 621 billion miles (1 trillion km), which makes it the largest solar system ever found by astronomers Researchers claimed by a paper that there be a 'Planet Nine' – about the size of Neptune – that orbits the sun in a very elongated orbit far beyond Pluto. The team behind the paper, which also describes this "mathematical" find, says that the 'Planet Nine' is expected to about 10 times the mass of Earth and is about 20 times farther from the Sun on average than Neptune. The authors