Talk:Tyche (hypothetical planet): Difference between revisions

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A fact from Tyche (hypothetical planet) appeared on Wikipedia's Main Page in the Did you know column on 21 February 2011 (check views). The text of the entry was as follows:

Did you know... that in 1999, a giant planet was hypothesized to exist in the outer Oort cloud of the solar system, but most astronomers are skeptical of its existence?

A record of the entry may be seen at Wikipedia:Recent additions/2011/February.

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+{{dyktalk|21 February|2011|entry=... that in 1999, a '''[[Tyche (planet)|giant planet]]''' was hypothesized to exist in the outer [[Oort cloud]] of the [[solar system]], but most astronomers are skeptical of its existence?}}
-==Appearance of this planet==
+{{WikiProject banner shell|class=Start|
-Would this planet excist of [[solid hydrogen]], since the melting temperature of hydrogen is 14 Kelvin? (OP)
+{{WikiProject Astronomy|object=yes|importance=low|solar_system=yes|ss-importance=low}}
-:Possibly you might find solid hydrogen at its core, the astrophysicists in question claim a surface (hard to define) temperature of around 200.15K, now the core would be at greater pressure, so possibly you might get solid hydrogen. But this gas giant is suspected a relatively mild temperature of -73 celsius, compare this to the coldest temperatures on earth which are in the region of -89 celsius. This is all assuming the planet even exists.[[User:Larryisgood|Larryisgood]] ([[User talk:Larryisgood|talk]]) 20:24, 14 February 2011 (UTC)
+}}
-::Yes, I realize this is a fully hypothetical situation. But about the temperature: How would the temperature of this planet be so high? The Oort Cloud isn't even reaching 10 Kelvin, if I'm right? How would this hypothetical planet get (or have gotten) it's energy to stay at that relatively high temperature? (OP again)
+{{archive box|auto=yes}}
-:I'm only an undergrad astrophysics student but I can give it a try. We can probably rule out any greenhouse effects like those that give Venus it's high temperature, since it's much too far away from the sun, and we can assume that since the mass is MUCH to low to even achieve brown dwarf status, that it's not producing its own energy through nuclear interactions. If a gas cloud were to collapse to something the size of a 4 jupiter mass object, its gravitational potential energy is converted to heat energy through interparticle collisions, and would be pretty significant. I can't give you the figures, but the energy would be more than enough to account for the kind of temperature that Tyche is postulated to have.[[User:Larryisgood|Larryisgood]] ([[User talk:Larryisgood|talk]]) 22:05, 14 February 2011 (UTC)
-== redirect ==
-Can someone please explain why this should be a redirect and not its own article? <b>[[User:Kingturtle|Kingturtle =]]</b> <small>([[User talk:Kingturtle|talk]])</small> 01:16, 15 February 2011 (UTC)
-:[[Planets beyond Neptune]] is the catch-all page for any and all trans-Neptunian planets]]. It has had a subsection on Matese and Whitmire's planet since it was created. Right now, there isn't enough new information to justify a new article. <b>[[User:Serendipodous|<font color="#00b">Serendi</font>]][[Special:Contributions/Serendipodous|<sup><font color="#b00">pod</font></sup>]]<font color="#00b">[[User talk: Serendipodous|ous]]</font></b> 09:37, 15 February 2011 (UTC)
-==Tenses need work==
-According to [http://www.huffingtonpost.com/2011/02/14/tyche-hidden-planet_n_823028.html this article] the evidence regarding the planet has not yet been presented, and won't be till WISE's data comes out in April, yet the article suggests the evidence has already been presented. [[Special:Contributions/68.146.64.9|68.146.64.9]] ([[User talk:68.146.64.9|talk]]) 07:24, 15 February 2011 (UTC)
-== The original paper ==
-http://arxiv.org/PS_cache/arxiv/pdf/1004/1004.4584v1.pdf  <span style="font-size: smaller;" class="autosigned">—Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/76.175.197.99|76.175.197.99]] ([[User talk:76.175.197.99|talk]]) 08:57, 15 February 2011 (UTC)</span><!-- Template:UnsignedIP --> <!--Autosigned by SineBot-->