Talk:Tyche (hypothetical planet)

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What happened to Tyche[edit]

It is now approaching January 2014, and the page says Tyche to be found by this year's end. Has WISE been able to confirm Tyche's existence yet? -- (talk) 00:09, 29 December 2013 (UTC)

WISE data has not detected Tyche because Tyche probably does not exist. Most astronomers were NOT expecting to find a gas giant with several Jupiter masses near the inner Oort Cloud. -- Kheider (talk) 01:57, 29 December 2013 (UTC)
Regardless, he's right; if the WISE data has been collated, we need to update the article to reflect that. Serendipodous 11:04, 29 December 2013 (UTC)
But the AllWISE data set was released only in November 2013, this "by combining data from the WISE cryogenic and NEOWISE (Mainzer et al. 2011 ApJ, 731, 53) post-cryogenic survey phases to form the most comprehensive view of the full mid-infrared sky currently available." I thought that there was a need to look for Tyche in this more complete data set. Has there been enough time (< 2 full months, including the holiday season) for that analysis to have been done? Chaozu42 (talk) 14:27, 1 January 2014 (UTC)
Might still be possible WISE has seen/detected Tyche without anyone realizing it. Tyche (if he exists) would take 1.8 million years to orbit the Sun, and Tyche would've been mistaken for a star due to its slow movement. Reminds me of when Pluto and Quaoar was seen in 1915 and 1954, respectively, with nobody realizing it. Correct me if I'm wrong. --Currency2012 (talk) 04:31, 3 January 2014 (UTC)
A large part of the thinking is that Tyche would be a fairly bright object in the infrared (and nearly invisible in the visual spectrum) and should be fairly obvious due to the parallax from 2 different time periods (data sets) making Tyche jump from one frame to another. For example when looking at two different images when Earth is on different sides of the Sun creates a decent parallax for an object only ~15000AU away. Also there were no powerful computers in 1915 or 1954. -- Kheider (talk) 09:07, 3 January 2014 (UTC)
It would be nice if we could include this in the article. Who is making these claims? Serendipodous 11:12, 3 January 2014 (UTC)
Anyways, shouldn't Tyche have been detected by now. It's kinda ironic we found a planet 6x as massive as Jupiter (PSO J318.5-22) outside our Solar System with no Sun, and yet we missed a planet 4x as massive as Jupiter in our own Solar System. Makes me wonder --Currency2012 (talk) 02:26, 7 January 2014 (UTC)
Could there be smaller (Neptune sized, maybe) planet(s) out there? I know that would not fit the Tyche theory (that's dead). But could something else be out there perturbing Sednas orbit? Cliffswallow-vaulting (talk) 06:44, 20 March 2014 (UTC)
Sure there could always be some kind of dynamically insignificant planet(s) in the Oort cloud. But Sedna was most likely perturbed by something that passed through the Solar System billions of years ago, perhaps something from the Suns birth cluster. Why do people always want to assume it has to be something that is still there? -- Kheider (talk) 07:30, 20 March 2014 (UTC)
Because that's more interesting. Serendipodous 07:36, 20 March 2014 (UTC)
A terrestrial world with a mass up an Earth mass and a semi-major axis significantly less than Sedna's (up to ~250 AU) can explain much of the architecture of the Kuiper belt and beyond, including the distribution of detached objects as observed. Such an object can very easily avoid detection if it is roughly in the direction of the Galactic Center. Also, we have observed Sedna, so statistically speaking there must be many more Sednas and several larger objects in similar orbits (else seeing Sedna was a fluke). --JorisvS (talk) 08:41, 20 March 2014 (UTC)

Giant exoplanet found 2,000 AU from it's star[edit]

Does this potentially change any of the thinking about the Tyche theory? I am not an astronomer so I don't know.

Here is the article (National Geographic)--

It has a mercifully short although still quite boring name: "GU Psc b" (talk) 19:45, 16 May 2014 (UTC)

Tyche has been ruled out, at least as its proponents defined it, by WISE data, so it's not too relevant. Serendipodous 20:20, 16 May 2014 (UTC)
Thanks! (talk) 23:05, 16 May 2014 (UTC)