What if “Planet 9” was hiding in observations from 40 years ago?

Notre Système solaire se compose de huit planètes. C’est du moins ce que l’on sait avec certitude aujourd’hui. Mais des indices pointent une neuvième planète qui pourrait toujours se cacher au-delà de l’orbite de Neptune. © dottedyeti, Adobe Stock

Have we finally found Planet 9? It’s way too early to tell. However, a candidate appears to have been found in data collected by the Iras satellite in 1983. Only recent observations will make it possible to confirm the reality of this object or not. On January 25, 1983, theAstronomical infrared satellite (Iras) was created … Read more