In 2012, astronomers spotted a “perplexing, isolated” object that was found to have a mass four to seven times that of Jupiter – by far the biggest planet in the solar system – around 100 lightyears away.

Experts believed it was the closest rogue planet ever found, but after studying the object over the past several years, researchers say that it might not be what they had originally thought.

The object, known as CFBDSIR 2149-0403, was thought to have been a planet that was kicked out of its star system or never had one in the first place and is now lonelily orbiting the Milky Way Galaxy.

With the possibility of it being a planet not as realistic as first thought, astronomers began theorising it could be a brown dwarf star but again this seems unlikely as it is too small, with the smallest brown dwarf stars having about 13 times the mass of Jupiter.