There was another planet in the Solar System - a new discovery

Scientists have discovered a dim object in archival infrared images that could be a candidate for Planet Nine. Researchers from National Tsing Hua University in Taiwan compared data from the IRAS (1983) and AKARI (2006–2007) missions and identified one object that shifted by 47.46 arcminutes. The authors emphasize that the finding does not prove the planet's existence but provides a new target for observations.

Scientists have likely taken an important step in the search for Planet Nine. In archival infrared images, they discovered a dim object whose brightness and characteristic slow movement match the expected properties of a body located at a vast distance from Earth and the Sun. Researchers from National Tsing Hua University in Taiwan published their work in the journal Publications of the Astronomical Society of Australia. They compared data from the infrared missions IRAS (1983) and the Japanese satellite AKARI (2006–2007), searching for a slowly moving object at a distance of 500–700 astronomical units with a mass 7–17 times that of Earth. Out of 22 matching candidates, only one remained after filtering. Between the observations, it shifted by 47.46 arcminutes. The authors emphasize that the finding does not yet prove the existence of Planet Nine but represents a promising new target for further observations. The Planet Nine hypothesis is based on the unusually tilted orbits of several distant Solar System objects, which appear to be influenced by an invisible force.