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This diagram that appears to be from an 1987 Encyclopedia (said to be Encyclopedia Britannica, with some quick digging found to be from some technology-orientated encyclopedia) article on the Pioneer probes depicts two objects: a "tenth planet" at 4.7 billion miles (~50 astronomical units) and a "dead star" at 50 billion miles (~538 astronomical units).
The article talks about how their combined gravitational forces perturb equally at the trajectories of the Pioneer probes. That is why I think none of them are Percival Lowell's ruled-out Planet X (which was believed to be tugging at Neptune rather than the probes).
As seen above, the diagram has been mostly cited by (seems-to-be) only believers of the Nibiru cataclysm, which most of us, including I myself, do not believe in. But I do find it interesting. The tenth planet's properties look a lot like the "tenth planet" theorized in 2017 by Renu Malhotra and Kat Volk, except that their theorized planet is 10 AU further away from the Sun than the "tenth planet" depicted (additionally, "10th planet" in the diagram was in terms of distance from the Sun and including Pluto; Malhotra's "tenth planet" was dubbed in order of being theorized with the further-out Planet Nine theorized in 2016).
The "tenth planet" could also alternatively refer to Eris, but was at the other side of the Sun (along with the closer Neptune and Uranus) at the time.
As for the "dead star", it could very well be Batygin and Brown's Planet Nine ("dead star" might mean gas or ice giant); with it being 538 AU away from the Sun in the diagram, it might fill in a part of Planet Nine's eccentric orbit with an estimated semi-major axis of between 400 to 800 AU.
Any thoughts on this? 118.148.103.216 (talk) 00:55, 14 April 2020 (UTC)
I was going to revert this edit per WP:ENGVAR but figured I'd check to see which variety of English we're using here. As far as I can tell, the first constructive edit using any variety was this one. But now I see that Primefac has reverted. Which is fine, I don't think anyone's ever discussed this here. Thoughts on what to do at this point? Does it really matter? Woodroar (talk) 00:50, 19 August 2020 (UTC)
Hello folks
I wish to note here that there was an update on news outlet this year about Planetary object between the size of earth and Mars .
here are the outlet and their website...
I am no Hasty , but I think these kind of outlets regarding this object will increase in quantity within coming years , So it better to anticipate this and make a Separate page regrading Kuiper cliff and planet ten !!!
Have a good times folks ! — Preceding unsigned comment added by 37.36.139.9 (talk) 20:35, 28 October 2021 (UTC)
https://www.nasa.gov/vision/universe/solarsystem/29jul_planetx.html — Preceding unsigned comment added by 2600:4040:2B48:C200:4D43:8E91:DBE:A4A6 (talk) 15:51, 20 July 2022 (UTC)
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