A latest study has reported that a massive alien world is orbiting 600 billion miles from its host star, which has made its solar system the biggest one known yet.

Astronomers have discovered the parent star for a gas-giant exoplanet dubbed 2MASS J2126, which was earlier thought to be a ‘rogue’ world flying freely in space.

Researchers said that the planet is at a distance of about 7,000 astronomical units (AU) from its star, which means the alien world finishes one orbit in every 900,000 years or so. One AU represents the average distance from Earth to the sun, which is roughly 93 million miles, or 150 million km.

If we compare, for example, Neptune is present about 30 AU from the sun, Pluto averages nearly 40 AU from Earth's star and, according to scientists, the newly hypothesized ‘Planet Nine’ never gets over 600 to 1,200 AU away from the sun.

In a statement, study lead author Niall Deacon, of the University of Hertfordshire in England, said, “The planet is not quite as lonely as we first thought, but it’s certainly in a very long-distance relationship”. The researchers said that the previous record for most extensively separated planet and star was 2,500 AU.

Deacon, along with his colleagues, analyzed databases of young stars, rogue planets and brown dwarfs, the odd objects larger than planets, but quite tiny to ignite the internal fusion reactions for powering stars, to find out whether they could link any of them together or not.

They found that 2MASS J2126, which was found eight years back, and a red dwarf star, known as TYC 9486-927-1, have been moving in space together nearly 104 light-years from our planet, which strongly implies that they belong to the same system.