Talk:Planet

Hasn't the issue of whether Pluto should be counted among the planets been decided a couple of years ago?

Contents

1 Planet redirects 2 youngest planet 3 The great Vandal attractors 4 Do laws of physics allow a Jupiter-sized solid planet? 5 Tm 6 added 7 definition

Planet redirects

• Planet Uranus and other unecessary Planet redirection pages Planet XXXX etc.
  • This is an unecessary extra redirection page, and really adds only clutter, not value. A search for Uranus already produces Uranus (planet), and a search for Planet would show Uranus (planet) on the first search results page, if that first page was not cluttered with all these extra, useless references to Planet Uranus, Planet Krypton, Planet Jupiter etc. Other such unecessary extra references I can find are
    • Planet Neptune& , Planet Krypton&, Planet Venus&, Planet Mercury&, Planet Mars&, Planet Jupiter&, Planet Saturn&, Planet Pluto&
    • Mercury/Planet&, Mars/Planet&
    • Jupiter(planet)& without a space character redirects to Jupiter (planet) with the space character
    • Mercury (Planet)& with capital P redirects to Mercury (planet) with a lower-case p.
    • Venus the planet&
    • there seems to be an entry for Venus_(planet) with an underscore character, but hard to be sure.
    • Those that I have marked with ""&"", I have already amended any links that point to the page to point to the XXXX (planet) page, ALL DONE. RB-Ex-MrPolo 07:27, 31 Jul 2003 (UTC)
  • I would keep them just because people will still write them into articles. If you really want to delete useless redirects hunt down the CamelCase ones. SimonP 16:00, Jul 31, 2003 (UTC)
    • I vote for keeping all the [Planet XXXX] redirects, but deleting Venus the planet, Mercury/Planet, Mars/Planet, Jupiter(planet) and Mercury (Planet) - Efghij 16:51, 31 Jul 2003 (UTC)
  • I've just done all the work of cleaning up, changing outdated references, and you want to keep the rubbish there in case someone messes up again in the future. Pleeeese ! That is not the way to achieve a decent clean structure. The extra entries add no value, and cause the search results to be over populated with a load of useless redirects. RB-Ex-MrPolo 16:55, 31 Jul 2003 (UTC)
    • It's wikipedia policy not to delete redirects which are likely to be used in the future. - Efghij 17:06, 31 Jul 2003 (UTC).
    • Firstly, if there is such a policy, please point me to it. If. Secondly, the whole Wikipedia:Disambiguation example is based on Mercury, and it doesn't mention it there as far as I can see. That seems pretty much to support what I am doing in cleaning up.And thirdly, just why do we need to preserve the future right to use the link <<Planet Mercury>> instead of just <<Mercury>>, or <<Mercury (planet)|Mercury>>. The search results for Planet are just a mess. That is the problem I'm trying to get rid of. And I'm not asking anyone else to do the work. You want to preserve useless redirects just in case someone might use a non-standard link in the future ??? Do we expect to have redirects for <<City of Rome>> as well as for <<Rome>> ? For "State of Dakota", "Country of France" etc ? Why does "Planet Mercury" have any more validity than those examples ? Why not encourage people to use the "standards" , encourage those enthusiasts amongst us who are willing to clean up ?RB-Ex-MrPolo 17:49, 31 Jul 2003 (UTC)
    • Agreed - the Planet ... links are no better than your "Country of France" example, let's clear up that search! Tompagenet 18:04, 31 Jul 2003 (UTC)
    • Planet XXXX is a very natural construction that people will type in. For instance "The book 2001 discusses a voyage to the planet Jupiter." Redirects are just as much for easy linking as they are for searching. Also in the long run the search function will probably be able to exclude these sorts of redirects. SimonP 19:05, Jul 31, 2003 (UTC)
      • Just what is so compellingly natural about putting square brackets around the two words, like <<planet Jupiter>>, instead of like planet <<Jupiter>>. You give your argument away in your own example, as you did not use a capital P for planet, because it is not part of the name. By your argument we would also end up with the search cluttered with links to the <<god Jupiter>>, to the <<<Jupiter space program>> etc etc etc.
        Anyway, if we delete them now, the search is improved, and nothing lost. If later, someone puts them back again, then some enthusiast like me can clean them up again, or someone can fix the search mechanism. But, meanwhile, I've done the work of cleaning up all the links. I'm just asking for the dead and useless redirect pages to be cleaned up also. I am not asking for deletion of ANY content. RB-Ex-MrPolo 17:09, 1 Aug 2003 (UTC)
        • planet <<Jupiter>> takes you to the wrong place. The correct link would be planet <<Jupiter (planet)|Jupiter>>, which some find unnatural. Martin 03:05, 3 Aug 2003 (UTC)
    • I'm beginning to think I've hit a raw nerve here which the administrators might want to take off into a separate discussion page ?? An argument between the natural organisers and the "do what comes naturally" people.RB-Ex-MrPolo 17:09, 1 Aug 2003 (UTC)
    • Please see Wikipedia:Redirect#How do I delete a redirect?. We have hundreds of redirects from natural constructions to wikipedia standard titles (eg New York City, State of Georgia, Mary Queen of Scots). This is no different. If someone is writing an article and they want to link to the page about the planet Jupiter, they won't type ... voyage to Jupiter ... if they think Jupiter is likely to be about the Roman god; insted they might write ... voyage to the planet Jupiter ... One of the ideas behind having redirects is that someone doesn't acidentally create a duplicate article. That's why we have a policy against deleating useful ones. - Efghij 21:50, 1 Aug 2003 (UTC)
• RTM please - They are valid redirects, keep. Furthermore the articles used to be at the /Panet names and that is where the old article history is. See [1] (http://www.wikipedia.org/w/wiki.phtml?title=Mars/Planet&action=history) If you delete that page then you violate the GNU FDL by removing author attribution. The other page title redirects (such as Planet Mars) were linked to at least some external sites and exist in at least some bookmark files. Thus they stay as well. --mav 07:01, 3 Aug 2003 (UTC)
• Leave the redirects. They can be usefull and do no harm. -- Infrogmation 18:37, 3 Aug 2003 (UTC)
  • Venus the planet, Mercury/Planet and Mars/Planet have a significant edit history, so they should be kept. I still favour deleting Jupiter(planet) and Mercury (Planet), which were created as redirects because of typos. - Efghij 03:53, 4 Aug 2003 (UTC)
    • I agree -- Jupiter(planet) and Mercury (Planet) should go. --Delirium 09:47, Aug 4, 2003 (UTC)

From the article:

• Sedna—a world orbiting the sun 2 billion miles beyond Pluto. Sedna, after the Inuit goddess ot the sea, is the provisional name given to this object by NASA[2] (http://www.timesonline.co.uk/printFriendly/0,,1-523-1037197,00.html)

No cite provided: removed until this can be corroborated. -- The Anome 13:35, 14 Mar 2004 (UTC)

Is this the same as 2004 DW? -- The Anome 13:41, 14 Mar 2004 (UTC)

Sedna (planet) says its 1200 miles (1900 km) vs 1600 km. Same team to have discovered it. I dunno. Morwen 13:44, Mar 14, 2004 (UTC)

2004 DW was reported last month, along with 50000 Quaoar, which was disocvered in 2002, is about a billion miles beyond Pluto. 2004 DW is about 900 miles across and Quaoar about 800. Sedna is bigger and further away. By rights, perhaps 2004 DW and Quaoar deserve entries here as planets too. Source: today's sunday Times, p.3. 217.75.160.30 13:48, 14 Mar 2004 (UTC) (Ooops I got logged out User:Matthew Stannard)

Wikipedia doesn't set trends. If everyone starts referring to them and treating them as planets, we will follow. Morwen 13:50, Mar 14, 2004 (UTC)

Having read & edited many of the Solar System pages today, let me say 1) I agree with Morwen that the "Is Sedna planet or planetoid issue?" is far from settled (it will take years); 2) The controversy is covered in the Sedna page; 3) Sedna is mentioned in the Solar System article, which is the best written and most complete of the bunch. Joelwest 04:03, 21 Mar 2004 (UTC)

I think this page should have more about the history of planets, such as which were ancient (and naked eye visible) and which discovered in modern times. There should also be more discussion on how a planet is defined--this page makes it seem very clear cut, when in truth it isn't. See [3] (http://www.thirdage.com/health/adam/ency/article/003531.htm) for a discussion that describes the main points. --zandperl 18:27, 20 Mar 2004 (UTC)

youngest planet

How do we incorporate information about the youngest planet recently discovered? :) --Hemanshu 20:01, 29 May 2004 (UTC)

The great Vandal attractors

I deleted the cute sayings or mnemonics. Just a silly vandalism magnet. -Vsmith 03:45, 5 Dec 2004 (UTC)

Do laws of physics allow a Jupiter-sized solid planet?

If anyone with knowledge of astrophysics could answer, is it possible (not necessarily probable, just possible) that somewhere in the universe is a solid, non-gaseous planet with an atmosphere that's sized like one of the gas planets in our solar system? Do the laws of physics (which I know nothing about -- I'm a computer science type) allow such a thing to happen? Or would an object that large need a very specific amount of self-gravity to stay together without crushing itself too much? --I am not good at running 14:45, 20 Jan 2005 (UTC)

From what little I know, a pile of any kind of material above a certain size (1 Ceres is already well above that size) will have more than enough self-gravity to stay together. Also, no known material (when you have that much of it) is strong enough to resist its own self-gravity pulling it into a sphere -- that's why all the planets, moons, and the larger asteroids are almost perfect spheres.

If the pile of material is too large, it may collapse into a neutron star or a black hole -- but I think the limit of "too large" is the Chandrasekhar limit, about 1.4 times the mass of our sun.

Would such a large, solid planet be classified as a Brown dwarf, White dwarf, or Black dwarf, or something else entirely?

I'm not astrophysicist, but I play one on Wikipedia :-).

--DavidCary 18:00, 3 Feb 2005 (UTC)

Tm

What means 13 Tm (the paragraph about Sedna)? Tm is abbreviation for what?

It's supposed to mean "terameters" (SI units). I think this could be considered a bit confusing or unusual, would prefer meters with scientific notation (M × 10^N m). -- Curps 18:46, 2 Feb 2005 (UTC)

added

i've added a few lines to this article. One on possible classes of exoplanets that do not exist in our solar system (ammonia giants and carbon planets) and one on a special class of hot Jupiters. My mother tongue is, however, not English so will please someone check my new lines to make sure they are in correct English?

definition

The definition at the beginning of the article (while beeing quite sensible) wouldn't be conseidered correct by many scientists. We won't find a better one, simply because the definition of what a planet actually is, is very much disputed.

Shouldn't that be mentioned and an additional definition be given as a possible example?

There's a seperate article on the ambiguities inherent in defining a planet; the link is at the bottom of the page. 157.140.6.143 11:20, 25 May 2005 (UTC)