Tagged: Planet Nine

Citizen scientists have flagged four objects for follow-up study in the hunt for the hypothetical Planet Nine. The four unknown objects were spotted in images of the southern sky captured recently by the SkyMapper telescope at Siding Spring Observatory in Australia. More than 60,000 people...

There’s something big lurking in the frozen hinterlands of our solar system that appears to be tugging at the tiny worlds beyond the orbit of Neptune. The object is assumed to be a hypothetical world called “Planet Nine,” which has an extremely far-flung orbit around...