Five-planet Nice model distant massive ninth planet is responsible for the alignment of the perihelia of several trans-Neptunian objects with semi-major axes greater than 250 AU. Although the mechanism for the ejection of the fifth giant planet in the five-planet Nice model is reminiscent of the origin of Planet Nine, with a gravitational instability including an encounter with Jupiter, it is unlikely to be the same planet. The estimated timing of the capture of Planet Nine onto its distant orbit, three to ten million years after the formation of the Solar System, when the Sun was still in its birth cluster, is inconsistent
Planet of the Spiders Planet of the Spiders Planet of the Spiders is the fifth and final serial of the 11th season of the British science fiction television series "Doctor Who", which was first broadcast in six weekly parts on BBC1 from 4 May to 8 June 1974. It was Jon Pertwee's last serial as the Third Doctor, and marks the first, uncredited appearance of Tom Baker as the Fourth Doctor. It marks the last regular appearance of Mike Yates. This serial introduces the term "regeneration". The serial is set in England and on the planet Metebelis Three. In the serial, the fired salesman