Talk:Tyche (hypothetical planet)

Ask an Astrobiologist

• Ask an Astrobiologist (Astrophysicist David Morrison : August 2, 2011)

I was going to delet this as spam ^^ but then saw that it is actually a NASA article mentioning the Tyche theory, as well as the Nemesis theory (and therefore maybe a valid reference for this article, I have not read all of the NASA article though, so I can't be sure yet). The person who posted this link should have taken a moment to explain what the link was for, rather than just posting the bare link with no explanation whatsoever. -- 129.82.31.128 (talk) 03:10, 11 November 2011 (UTC)

I added the link to the talk page since it is a good link for the woo-woos to see. I have now also hyperlinked David Morrison's name for people that do not follow astronomy. But I am also not sure it would add much to the Tyche article as a reference. Nemesis (a red dwarf star/brown dwarf) is not expected to exist because it should have been fairly obvious (bright) in previous J-Band infrared surveys, but it is plausible that there is a Jupiter mass object near the edge of the solar system. -- Kheider (talk) 13:10, 11 November 2011 (UTC)

Alternative Theory for Disturbance of Sedna?

A new science article came out today which could certainly be a presentation of an alternate theory on the cause of Sedna's disturbed orbit. But it does not come right out and say it, so it could not (yet) be used as a source until there is an explicit theoretical connection drawn by scientific sources. But that may not be too far away. Here is the article (from a credible science source): http://www.sciencedaily.com/releases/2011/11/111110142102.htm -- 129.82.31.128 (talk) 03:06, 11 November 2011 (UTC)

That's referring to this idea, I think. Sedna isn't mentioned in that article, so connecting it to this hypothesis would be OR. Serendi^podous 10:49, 11 November 2011 (UTC)

A hypothetical fifth ice giant being ejected from the early solar system has nothing to do with planet Tyche. Jupiter is not massive enough to eject a body more massive than itself. See: Young Solar System's Fifth Giant Planet? for David Nesvorny's arxiv paper. -- Kheider (talk) 13:10, 11 November 2011 (UTC)

Rather than opining, the mention of this new article just alerts editors that an alternative theory along these lines might show soon, although the recent article does not mention Sedna (and so the point is just that it might be helpful to watch science news outlets-- in case a new reference does emerge). I was not promoting any theory but just staying alert to an emerging potential source.

129.82.31.18 (talk) 20:20, 11 November 2011 (UTC)

Tyche announced?

Full Results of the WISE survey were released on March 14th, 2012. So have they found Tyche yet?--98.183.187.27 (talk) 17:53, 18 March 2012 (UTC)

No. Tyche probably does not exist. -- Kheider (talk) 18:33, 18 March 2012 (UTC)

Won't it take years though, to analyze all of the data? 70.166.85.174 (talk) 05:18, 2 August 2012 (UTC)

Yes it's premature to say that it doesn't exist when much of the data hasn't been analyzed. 184.183.173.20 (talk) 16:47, 10 November 2012 (UTC)

All of the data has been looked at for obvious bright objects that would shift as a result of the parallax of the Earth moving from one side of its orbit to the other. So *IF* Tyche exists, it is likely on the low mass range of the estimates. So it is valid to say, "Tyche probably does not exist." -- Kheider (talk) 17:12, 10 November 2012 (UTC)

Or unless there are a couple of low-mass objects. Less likely as well, but possible. DiamondLattice (talk) 17:08, 3 September 2013 (UTC)

This is not trivia, please don't delete

" Whitmire and Matese speculate that Tyche's orbit would lie at approximately 500 times Neptune's distance; equivalent to 15,000 AU (2.2×10^12 km) from the Sun, a little less than one quarter of a light year. This mean that if we use the fastest spaceship up-to-date New horizons probe, 44,537 miles per hour (71,675 km/h) [11] it would take many years(about > 3504 ) to travel."

In this article it is for 2 reasons. 1) This is a hypothetical near unknown planet, the best "source" for "discovery" and cutting of if it exists or no for even most people are photos. When somebody made a photo of Earth from space it was a bigger "prove", that for many people calculations by humans thousands years ago. So it show why it this so big and hard gap to made science work on Kuiper belt. 2) Any user "from internet" or "educational"/"newspaper editor" who have basic or no knowledge can use it to show distance comparison easily for most people on Earth(and many of them don't remember what is AU, or want to calculate this - the computers are to leave the brain calculation force for creative thinking). — Preceding unsigned comment added by 89.68.103.25 (talk) 13:44, 24 May 2012 (UTC)

Yahoo answers in not a reliable source. The New Horizons trivia adds no value to the assumed orbit of this object. It can also mislead the casual reader into assuming that NH is traveling in the direction of Tyche even though if Tyche exists we do not know where it is. Is 3504 years, "many years"? This sentence is poorly worded and adds little value to the article. -- Kheider (talk) 14:01, 24 May 2012 (UTC)

Gomes is not Tyche

The planet Gomes speculates about would not be Tyche because it would be too close to the Sun (1500AU) and would only be as massive as Neptune. -- Kheider (talk) 18:46, 16 November 2012 (UTC)

Size

The note says: "A cold hydrogen-rich gas giant slightly more massive than Jupiter (below about 1.6 M_J) would be larger in volume than Jupiter, but for higher masses, degenerate pressure will cause the planet to shrink". Could anyone point to where the source says this? Figure 4 in the source does not quite seem to say this... --JorisvS (talk) 23:19, 8 January 2013 (UTC)

The reference states 500 M_E which is 1.6 M_J since Jupiter is 318 times more massive than Earth. -- Kheider (talk) 23:56, 8 January 2013 (UTC)

Thanks. --JorisvS (talk) 00:41, 9 January 2013 (UTC)

The graphic

Why is the sun at the centre of Tyche's supposed orbit rather than at one of the focii? --46.208.111.212 (talk) 07:45, 25 July 2013 (UTC)

There is no graphic describing Tyche's orbit. Serendi^podous 07:48, 25 July 2013 (UTC)

As is common, the reader is probably confusing the obsolete Nemesis (hypothetical star) (95000 AU from the Sun) with Tyche, a hypothetical planet much closer to the Sun (10000-15000AU). Many websites confuse these two very different theories. -- Kheider (talk) 19:34, 11 September 2013 (UTC)

What happened to Tyche

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? --98.183.188.69 (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. Serendi^podous 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." http://wise2.ipac.caltech.edu/docs/release/allwise/ 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)