Team behind discovery of planet with three stars retracts their article AAS_Publishing sciencemagazine
approximately four times the size of Jupiter. They also noted its apparent odd orbital system—the planet appeared to orbit just one of the stars while the other two stars were farther away.
Subsequent to the publishing of the paper, in 2017, another international team of researchers found evidence suggesting that the planet was not a planet after all—the data observed the year before, they claimed, was from a background object, perhaps a dwarf star. They further noted in their, that the object was much more likely to be something moving unusually fast in the background in a path that coincided with star system HD 131399.
That finding led the original team to take another look at their earlier work and then to observe star system HD 131399 over an extended period of time. This allowed them to capture imagery of the star system in motion.
The researchers have suggested to members of the press that their work highlights the risk in making assumptions about stationary backgrounds in star systems, and that it is their hope that their experience will help to improve astronomy. All of the authors of the original paper have agreed to having their paper retracted.
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