Talk:Neptune

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Rotation period revised[edit]

The planet's estimated rotation has been revised to 15h 57m 59s. See:

Stolte, Daniel (June 29, 2011). "Clocking Neptune's Spin". The University of Arizona. Retrieved 2011-06-05. 

Regards, RJH (talk) 21:50, 6 July 2011 (UTC)


Internal Structure[edit]

The internal structure is described quite unconditionally: the reader is given no clue about the high uncertainties, both quantitative and qualitative, involved in these models. Nor is there any information given about how these models were derived. Perhaps the tone needs to be changed.Ordinary Person (talk) 02:45, 9 July 2011 (UTC)

Well, improvements are certainly welcome. But, in cases like this, some caution is needed to avoid weasel words and unnecessary vagueness. Thanks. Regards, RJH (talk) 20:00, 10 July 2011 (UTC)

Superheated is incorrect[edit]

In the description of Neptune's internal structure, the word superheated is incorrect. Superheat refers to the number of degrees above saturation temperature for steam. It refers to a temperature between normal boiling and critical temperatures for water at which temperature the water must be under more than atmospheric pressure. If this pressure is suddenly released, the water will suddenly boil. The mantle of Neptune is in the supercritical temperature regime in which there will be no phase transition with decreasing pressure. User:Fartherred from 207.224.85.91 (talk) 09:40, 9 July 2011 (UTC)

Not only is the use of the word superheated wrong, worse yet it lacks a citation. There is no reference given that refers to any superheated fluid in Neptune's mantle. This in a featured article, oh, the horror! User:Fartherred from 207.224.85.91 (talk) 14:48, 9 July 2011 (UTC)
The word superheated was in the second of four contributions added by User:203.129.151.10 at 14:18 hours on the 4th of September in the 2006th year of our Lord. 207.224.85.91 (talk) 15:31, 9 July 2011 (UTC)
I cannot wait for RJH to do all the work. I corrected this one myself. People might still improve upon the state in which i left the article Fartherred (talk) 18:33, 9 July 2011 (UTC)
WP:BEBOLD applies, as always. Thanks. Regards, RJH (talk) 19:55, 10 July 2011 (UTC)

The Times[edit]

States that Neptune has today completed one orbit since it was discovered. Jackiespeel (talk) 14:12, 12 July 2011 (UTC)

There was a blurb in the AIAA Daily Launch about it this morning; here's the BBC news link they provided. siafu (talk) 15:49, 12 July 2011 (UTC)

Grammar[edit]

Incorrect: "none of the planet's remaining 12 moons were" Correct: "none of the planet's remaining 12 moons was"

The word 'none' does not have to be singular. The Times suggests that it is acceptable to use it as a plural except in the specific cases where it means not one or no one.[1] Hence, I think the wording is okay. Thanks. Regards, RJH (talk) 16:36, 6 August 2011 (UTC)

On Galileo's observations.[edit]

It is a very cowardly thing, with the benefit of 400 years of hindsight, to accuse someone of "failing" to see what they "should" have seen and I have no intention of doing so. But having said that, I have a small issue with this:

"... Since Neptune was only beginning its yearly retrograde cycle, the motion of the planet was far too slight to be detected with Galileo's small telescope...."

Using the well-known and freely available Cartes du Ciel software, it is easy to model the movement of Jupiter and Neptune past the stars during the interval in question - 28th December 1612, to 27th January 1613. During that time Neptune moves past two stars of at least the same brightness as it. 30th January 1613 is particularly interesting, as Neptune moves past and very close to what is the brightest star in the area during the time in question. Thus, David Jamieson's findings that Galileo <could> have observed Neptune's motion, despite it being at the prograde/retrograde changeover point, are eminently believable. Old_Wombat (talk) 10:13, 7 September 2011 (UTC)

Just[edit]

"Neptune is an intermediate body between Earth and the larger gas giants: its mass is seventeen times that of the Earth but just 1/19th that of Jupiter"

There must be a better way to word this. This is the sort of construction that makes non-scientists laugh at scientists. I proposed removing the "just" but was reverted. Any other ideas? --John (talk) 15:25, 16 September 2011 (UTC)

Well, "and is" should work. Mlpearc Public (Talk) 15:30, 16 September 2011 (UTC)
Yes that makes sense, as does Mlpearc Public's suggestion. There's another issue in that the wording "intermediate body between Earth and the larger gas giants" is ambiguous; the same statement is true of Mars. Perhaps "intermediate-sized body between the terrestrial planets and the larger gas giants"? Regards, RJH (talk) 15:52, 16 September 2011 (UTC)
The statement isn't true of Mars, since it is much smaller than the Earth it can't be considered to be intermediate between the Earth and any larger bodies. siafu (talk) 19:59, 16 September 2011 (UTC)
Upon further reflection, I suppose you might have meant that Mars is intermediate in placement between Earth and the gas giants, which is, I suppose, true, but the sentence makes it quite clear that mass is being discussed. In other news, I'm not sure I understand the objection to the wording enough to be helpful-- guess I'm too much of a scientist. I think it does a reasonable job of imparting the scale of solar system bodies to the layperson, and scale is one of the most important (and IMHO, least appreciated) things to impart when discussing any astronomical topics in lay terms. siafu (talk) 20:47, 16 September 2011 (UTC)
The statement about mass is in a separate clause of the sentence, so it is subject to interpretation. I think it's just better to be unambiguous. Regards, RJH (talk) 21:53, 16 September 2011 (UTC)

updated data available[edit]

Tycho Magnetic Anomaly-1 (talk) 22:25, 26 October 2011 (UTC)

surface gravity[edit]

Composition and structure "The planet's surface gravity is only surpassed by Jupiter, making the two gas giants the only planets in the solar system with a surface gravity higher than the Earth". But Saturn has 1.044g surface gravity (or 1.06 in List of Solar system objects by size). So there are three gas giants with sg higher than earth. — Preceding unsigned comment added by 93.113.98.63 (talk) 16:24, 12 November 2011 (UTC)

Yep, it was introduced by this unsourced edit. I've removed the sentence clause since it didn't add much value. Thanks. Regards, RJH (talk) 00:03, 13 November 2011 (UTC)

Re: planetary status[edit]

Just so everyone knows, I'm not out to challenge the IAU's assignment of "planet" status to Neptune, but I wanted to raise a question I'm not sure anyone has considered -- Per the IAU's criterion of a planetary body having "cleared the neighborhood" of other gravitationally significant bodies in order to be considered a planet, and recognizing that Neptune's orbit crosses that of Pluto regularly, does Neptune in fact meet the IAU's definition of a planet? Just a thought. Evanh2008, Super Genius Who am I? You can talk to me... 03:21, 14 November 2011 (UTC)

Sorry but this isn't really the place for this type of debate. You could try posting to Wikipedia:Reference desk/Science. Regards, RJH (talk) 04:01, 14 November 2011 (UTC)
Will do; thanks. Feel free to clear this if you want. Evanh2008, Super Genius Who am I? You can talk to me... 04:16, 14 November 2011 (UTC)
You're misunderstanding "clearing the neighbourhood", as many seem to do: it doesn't mean there's nothing else in that region, it's just that the planet is the dominant object in that region. If Pluto suddenly magically disappeared, Neptune's orbit would only change negligibly; the same cannot be said the other way around. Double sharp (talk) 08:32, 7 July 2013 (UTC)

Reticent caption[edit]

At Orbit and rotation, the caption mentions only the Sun and Neptune, but there's a lot more going on. Rothorpe (talk) 03:01, 19 December 2011 (UTC)

Yes I agree. It's a busy image and I'm not quite sure what message it is trying to communicate. Regards, RJH RJH (talk) 02:31, 30 March 2012 (UTC)


Name of planet[edit]

It´s stated in this article that the Earth is NOT, and unlike the other planets, named after some character from classical mythology. This is NOT true. The Earth is known as Tellus, meaning Earth (Mother Earth, a goddess) in Roman myth. Smilesofasummernight (talk) 12:27, 30 April 2012 (UTC)

But we don't call the planet Tellus or even Mother Earth in English, except perhaps poetically. We call it Earth. In any case, this is the article for Neptune, so I'm not entirely sure how it's relevant either way...--Patteroast (talk) 18:25, 30 April 2012 (UTC)
The following wording seems more accurate, "The demand for a mythological name seemed to be in keeping with the nomenclature of the other planets, all of which have a history of being named for Greek and Roman mythology." According to the Terra (mythology) page; "In several modern Romance languages, terra (or French terre) is the name of planet Earth." While the English word for the planet is not mythological in origin, it does have a history of being named for mythology. The fact that currently it is still named after roman mythology in modern non-english languages, to me, makes it worth avoiding singling earth out in the way it currently is. Especially considering, like Patteroast said, this is the Neptune article and I don't see why we shouldn't just side-step the issue this way. AaronMP84 (talk) 08:54, 21 June 2013 (UTC)
You're forgetting something. Wodenhelm (Talk) 23:06, 28 June 2013 (UTC)
Well pointed out. I'm going to make the change I suggested above. AaronMP84 (talk) 05:04, 3 July 2013 (UTC)

Please add to exploration[edit]

Please add the following:"
Nearest estimated new exploration of Neptune is 24 August 2014, when the New Horizons probe will pass Neptune's orbit. [1]" — Preceding unsigned comment added by 89.74.110.81 (talk) 01:16, 9 January 2013 (UTC)

Not done for now: I'm not exactly clear that passing Neptune's orbit constitutes "exploration", even if we construe that rather broadly. Please feel free to reopen this edit request if you'd like a second opinion. (Thanks for providing a ready-to-use ref, btw. If you want to be an even more awesome IP editor, sign your talk-page posts by typing four tildes: ~~~~.) Rivertorch (talk) 10:43, 10 January 2013 (UTC)
Even though this request was answered 6 months ago, I would like to point out that New Horizons will pass Neptune, But won't explore the planet. what i mean by explore is that the craft won't send back any info about Neptune. Best,--Anderson - What's up? 03:39, 7 July 2013 (UTC)
I would just add, to make clear what was already hinted at by the responses previously, that while New Horizons will pass the orbit of Neptune, it will not pass remotely close to the planet itself because Neptune and Pluto are about 1/4 of a revolution out of phase with each other, ergo they are about 15 AU apart. So New Horizons' closest distance to Neptune will be more than the distance between Earth and Saturn. Sailsbystars (talk) 04:43, 7 July 2013 (UTC)

NASA Announces Discovery of 14th Moon[edit]

Can the number of moons in this and the sub-article be updated following NASA's announcing of new satellite S/2004 N 1. NASA Hubble Finds New Neptune Moon

Neptune's Climate[edit]

It is written that the pole is 283 K (!) warmer than the rest of the planet... If my memory is correct,the difference was around 10 degrees. — Preceding unsigned comment added by 79.100.148.22 (talk) 01:30, 24 July 2013 (UTC)

Yeah.... I went and checked the article. I'll fix that or remove the offending statement.... Sailsbystars (talk) 02:27, 24 July 2013 (UTC)

Climate: Nearly Supersonic[edit]

Under the Climate section the wind speeds are described as "nearly attaining supersonic flow". I am curious if this is a good way to describe it because the speed of sound depends on the density of its medium. Are those speeds supersonic relative to the speed of sound in Neptune's atmosphere, or Earth's atmosphere? The description struck me as a potential misnomer. Althrretha (talk) 17:55, 2 August 2013 (UTC)

Aren't you answering your own question? Since the speed of sound depends on the medium, this refers to the speed of sound in Neptune's atmosphere. — Reatlas (talk) 02:04, 3 August 2013 (UTC)
I am not answering my own question because I didn't take the reference to "supersonic speeds" to automatically refer to the speed of sound in Neptune's atmosphere. I don't know what the speed of sound is in Neptune's atmosphere, but I'm guessing it is not the same as in Earth's atmosphere. My concern is that the article as written does not specify which atmosphere its frame of reference is. Althrretha (talk) 19:44, 5 August 2013 (UTC)
Alright, but whereas "speed of sound" alone might be ambiguous, "supersonic flow" is more of a term used in fluid dynamics, so it refers to the speed of wave propagation in the specific medium, be it Earth's, Neptune's or any other's. — Reatlas (talk) 11:55, 6 August 2013 (UTC)

Superfluous Suffix[edit]

In the Reference Box\Physical Characteristics\Equatorial Radius, there is a </ref> suffix that needs not exist, as there is no "ref" preceding it. Please correct it, those of you who can edit the page! Queen4thewin (talk) 00:22, 24 August 2013 (UTC)

Yes check.svg Done, thanks. — Reatlas (talk) 01:58, 24 August 2013 (UTC)

Infobox: Atmosphere composition[edit]

The last field in the infobox is broken. Other planet articles use HTML (<table>...</table>) instead of wikimarkup ({|...|}). I'm not sure I can fix this without breaking the whole box, so I'd rather leave it to someone else. --ἀνυπόδητος (talk) 20:10, 7 December 2013 (UTC)

Another possible reason for high temperature of Neptune's thermosphere[edit]

Since the article is locked I couldn't edit it. The following page suggests that diamond formation is possibly a cause for the high temperature of Neptune's thermosphere: http://www.berkeley.edu/news/berkeleyan/1999/1006/diamonds.html. It would be useful to add it to the relevant paragraph.

Jamadagni (talk) 15:54, 20 December 2013 (UTC)

Atmosphere[edit]

[...] "Other candidates are gravity waves from the interior that dissipate in the atmosphere." That would be really something special, at least 'a citation would be needed', but it just looks like vandalism to me.... Regards, Noud van Klinken— Preceding unsigned comment added by 213.93.217.25 (talk) 20:41, 28 February 2014 (UTC)

Actually, Noud, look at gravity wave and you'll see that it is nothing dubious: Gravity waves are something from fluid dynamics. The thing from general relativity is called gravitational wave. --JorisvS (talk) 11:18, 1 March 2014 (UTC)

Semi-protected edit request on 10 April 2014[edit]

162.127.107.1 (talk) 19:31, 10 April 2014 (UTC) I would like to change wrong facts

X mark.svg Not done - Submit your changes in this form, "please change X to Y". Anupmehra -Let's talk! 19:51, 10 April 2014 (UTC)

Semi-protected edit request on 10 April 2014[edit]

162.127.107.1 (talk) 19:39, 10 April 2014 (UTC)

نبتون[عدل] من ويكيبيديا، الموسوعة الحرة نبتون


صورة لكوكب نبتون تم التقاطها من مركبة فويجر 2 في صيف 1989 المكتشفون المكتشفون يوهان جدفريد جال Aww shit I ripped my pantfuck يحنا كوش آدامس اكتشف في 23 سبتمبر، 1846 م الخصائص المدارية نصف المحور اﻷكبر للمدار الإهليجي 4.498.252.900 كم 30،06896348 وحدة فلكية اللا مركزية المدارية 0،00858587 الحضيض 4.459.631.496 كم 29،81079527 وحدة فلكية الأوج 4.536.874.325 كم 30،32713169 وحدة فلكية الفترة النجمية 164 عام و 323 يوم و 21،7 ساعة الفترة التزامنية 367،4857 يوم السرعة المدارية المتوسطة 5،432 كم/ثانية السرعة المدارية القصوى 5،479 كم/ثانية السرعة المدارية الدنيا 5،385 كم/ثانية الميل المداري 1،76917° عدد اﻷقمار 13 الخصائص الطبيعية القطر الاستوائي 49.528 كم 3،88 مرة قطر اﻷرض القطر القطبي 48.681 كم التسطح 0،0171 مساحة الكوكب 7،619 × 109 كم2 أي 14،94 مرة مساحة اﻷرض حجم الكوكب 6،254 × 1013 كم3 أي 57،74 مرة حجم اﻷرض كتلة الكوكب 1،0243 × 1026 كغ أي 17،147 مرة كتلة اﻷرض الكثافة 1.638 × 103 كغ\م³ الجاذبية الاستوائية 11،15 م\ث² سرعة الإفلات 23،5 كم\س فترة الدوران 16 ساعة و 6 دقائق و 36 ثانية سرعة الدوران على خط الإستواء 2،68 كم\ث أي 9660 كم\س الميل المحوري 28،32° البياض 0،41 الحرارة على السطح الدنيا 50 ك°، الوسطى 53 ك° ، القصوى -- خصائص الغلاف الجوي الضغط الجوي --- الهيدروجين 80% +- 3،2% الهليوم 19% +- 3،2% الميثان 1،5% +- 0،5% الأمنياك 0،01% الإيثان 0،00025% الأستيلان 0،00001% الهيدروجين الثقيل 192 جزء في المليون


صورة لكوكب نبتون من تلسكوب هابل بألوانه الطبيعية وثلاثة من أقماره. نبتون Neptune (رمزه ) معناها بالإغريقية إله الماء، ويطلق عليه الكوكب الأزرق هو أحد كواكب النظام الشمسي وهو رابع أكبر الكواكب الثمانية، وهو ثامن أبعد كوكب عن الشمس في نظامنا الشمسي وهو رابع أكبر كوكب نسبةً إلى قطره وثالث أكبر كوكب نسبةً إلى كتلته. سمي هذا الكوكب نسبةً إلى الإله الروماني للبحر (نبتون) حيث تم اكتشافه في 23 سبتمبر عام 1846. كان نبتون أول كوكب يتم اكتشافه عبر المعادلات والتوقع الرياضي بدلاً من الرصد المنتظم. فالتغيرات غير المتوقعة في مدار كوكب أورانوس قادت الفلكيين إلى استنتاج أن الاضطراب الجذبي ناتج عن كوكب مجهول يقع خلفه، واكتشف الكوكب على بعد درجة واحدة من الموقع المتوقع عبر المعادلات الرياضية. أُكتشف نبتون من طرف عالم الفلك يوهان غتفريد غال(Johann Gottfried Galle) يوم 23 سبتمبر 1846، في الوقت نفسه الذي كان فيه العُلماء أوربان لوفيريي وجون كوش آدامز(John Couch Adams) يتوقعان بالحساب مكان وجود نبتون. ولو كان وزنك فوق الأرض 70 كيلوغرام يصبح فوق نبتون 84 كيلوغرام. وتجتاح نبتون عاصفة هوجاء أشبه بالعاصفة التي تجتاح كوكب المشتري ويطلق على عاصفة نبتون اسم "البقعة المظلمة العظمى" (حيث أن هناك واحدة أصغر شبيهة بها). ولا يعرف منذ متى نشبت لأنها بعيدة ولاترى من الأرض. وقد اكتشفتها مؤخرا المسابير الفضائية الاستكشافية. ونبتون هو أبعد الكواكب والأقل معرفة بالنسبة لنا, وأقماره المعروفة حتى الآن هي 13. وهناك ست حلقات تدور حول نبتون. له أقمار أهمها ترايتون الذي يبلغ قطره 2720 كم وتنبعث فوقه غازات. ويظن العلماء أنه يوجد تحت سحب نبتون محيط من الماء أشبه بمحيط أورانوس، وجوّه مكون من الهيدروجين والهيليوم والميثان. تمت زيارة كوكب نبتون مرة واحدة فقط بواسطة السفينة الفضائية فويجر 2 والتي طارت إلى الكوكب في الخامس والعشرين من أغسطس عام 1989. نبتون مماثل في التركيبِ لكوكب أورانوسِ، وكلاهما لهما تراكيب مختلفة من أكبر العمالقة الغازِية: كوكبا المشتري وزحل. آثار الميثانِ في الكوكب تفسر سبب ظهوره باللون الأزرق. محور كوكب نبتون مائل بزاوية 50 درجة عن محور دورانه، وهو يبعد عن مركز نبتون حوالي 10000 كم، ومن هذه المغناطيسية القوية هنالك شفق قطبي في نبتون وكذلك في قمره تريتون. ولنبتون عدة أقمـار أحـدها هو ترايتون الذي يُعد أكبر أقمار نبتون وأبرد جسم في المجموعة الشمسية بحيث تبلغ حرارته 230- درجة مئوية. محتويات [أخف] 1 المدار 2 التركيب والغلاف الجوي 3 اكتشافه 4 أقمار وأحزمة نبتون 5 المصادر 6 المراجع المدار[عدل] المسافة بين نبتون والشمس هي 30 ضعف المسافة بين الأرض والشمس (أي أنها 30 و.ف). يتحرك بلوتو داخل مدار نبتون لمدة 20 عام مرة كل 248 سنة وهذا يجعل بلوتو أقرب للشمس من نبتون في ذلك الوقت. وقد كان عبور بلوتو الماضي في 23 يناير/1979 وبقي داخل المدار حتى 11/فبراير/1999. يدور نبتون حول الشمس بمدار إهليجي ويبلغ متوسط بعده عن الشمس 4495.06 مليون كم (2,793.1 مليون ميل)، ويدور حولها مرة كل 165 سنة. وعندما يدور حول الشمس فإنه يدور حول محوره ويُتم دورة كل 16.1 ساعة. ويميل محور دوران نبتون بزاوية 30 درجة (وهذا بناءً على ميله عن مداره حول الشمس، حيث أن محوره يميل 30 درجة عن الوضع العمودي له مع المدار). التركيب والغلاف الجوي[عدل] يَعتقد العلماء أن كوكب نبتون يتكون أساسا من الهيدروجين والهليوم والماء وسيليكات، ونبتون هو كوكب غازي كثافته ليست كبيرة، وبالتالي فليس له سطح صلب يُمكن المشي عليه، بينما الكواكب الصخرية المكوّنة من الصخور – مثل الأرض – هي صلبة والمشي عليها مُمكن. تتصاعد سحب كثيفة فوق كوكب نبتون تغطي سطحه وتجعل رؤيته صعبة. وفي نواته تكون الغازات مضغوطة جدا، وهي عبارة عن مزيج من الغازات في طبقة سائلة تحيط بالنواة المركزية للكوكب التي تتكوّن من صخور وثلوج. إن ميل محور نبتون يتسبب في انقسام الكوكب لنصفين من حيث درجة الحرارة، وهما النصفان الشمالي والجنوبي، مما يؤدي إلى التغير في درجات الحرارة وبالتالي تولّد الفصول (أي أنه توجد عليه فصول كما في الأرض). يُحاط نبتون بطبقة سميكة من الغيوم ذات حركة سريعة، حيث تهب الرياح بسرعة تصل إلى 1.100 كم (700 ميل) في الساعة. الغيوم البعيدة عن سطح نبتون تتألف أساساً من الميثان المتجمد، ويَعتقد العلماء بأن الغيوم التي تقع تحت سحب غاز الميثان داكنة تتألف من كبريتيد الهيدروجين. الغلاف المغناطيسي لكوكب نبتون يشبه إلى حد كبير الذي يملكه أورانوس، وهو أكبر بكثير من الذي تملكه الأرض مثله في ذلك مثل أورانوس. وتشير نظرية رياضية إلى أن حلقات نبتون تؤثر على حركة الجسيمات في مجاله المغناطيسي.[1] اكتشافه[عدل]  مقالة مفصلة: اكتشاف كوكب نبتون


عواصف فوق سطح نبتون: البقعة المظلمة الكبيرة (أعلى), Scooter (السحابة البيضاء الوسطية) و البقعة المظلمة الصغرى(أسفل)

تظهر رسومات غاليلو أنه كان أول من لاحظه في 28 كانون الأول 1612 ومرة ثانية في 27 كانون الثاني 1613 وفي كلتا الحالتين اعتقد غاليلو أنه يراقب نجم ثابت عندما ظهر بوضوح في ظلمة السماء إلى جانب المشتري لذلك لم يعتبر غاليلو على أنه مكتشف نبتون. و ضع أليكسيس بوفارد Alexis Bouvard سنة 1821 جداول فلكية لنبتون جار أورانوس إلا أن النتائج اللاحقة أظهرت انحرفات كبيرة عن جداوله مما قاد بوفارد إلا فرض وجود جسم غير معروف يحدث تغيرات في المدار نتيجة فعل الجاذبية. بدأ جون كوش آدامز (John Couch Adams) في عام 1843 – وهو عالم فلك ورياضيات من جامعة كامبردج – بعمل دراسة حول بعد وكتلة جرم كان يُعتقد أنه يقع خلف كوكب أورانوس (وذلك بناءً على اضطراب في مدار أورانوس). ولقد أكمل آدامز دراساته ومن ثم أرسلها إلى السير جورج آيري – العالم الفلكي الملكي في إنكلترا – والذي طلب من آدامز توضيح الأمر. وقد بدأ آدامز بإعداد مشروع الرد ولكنه لم يرسله قط لعدم وجود حماسة لحل مشكلة أورانوس. وفي الوقت نفسه بدأ أوريان يانوش - وهو شاب لم يكن يعرفه آدامز - في العمل على المشروع، وبحلول منتصف عام 1846 استطاع التنبؤ بموعد ومكان ظهور نبتون، وقد كانت توقعاته مشابهة لتلك التي كانت لدى آدامز. وقد قام يانوش بإرسال نتائجه إلى الدكتور "آيري" في مرصد غرنتش، لكن آيري لم يستطع رصده فأرسل طلباً بذلك إلى الفلكي "جيمس تشالّس" في كامبردج ولكنه لم يكن يملك خرائط جيدة لبرج الدلو (وقد كان نبتون فيه آنذاك) ولذلك لم يَستطع رصده. ولم يستطع جيمس إقناع أحد من زملائه بالرصد فأرسل رسالة إلى مدير معهد برلين "جون إنك" يَطلب منه فيها رصد نبتون. فقام بدوره بتكليف فلكيَّين في المعهد بالمهمة، وقد استطاعا رصد الكوكب واكتشافه. وبسبب هذا كله فقد ثار جدل بين الفلكيين بشأن المُكتشف الحقيقي للكوكب، انتهى بتقاسم الشرف بين كل من آدامز ويانوش.[1] أقمار وأحزمة نبتون[عدل] يوجد لنبتون 13 قمرا أكبرها هو ترايتون الذي يدور حوله على بعد 354,750 كم (220.400 ميل) منه، ونصف قطره يبلغ حوالي 1350 كم (0.2122 من نصف قطر الأرض). وهو قمر نبتون الوحيد الذي يدور عكس اتجاه دوران نبتون. ترايتون له مدار دائري ويدور حول نبتون مرة كل ستة أيام، ودرجة حرارة سطحه تبلغ حوالي -235 درجة مئوية (390- فهرنهايت). وهناك بعض السخانات على ترايتون بالرغم من برودته الشديدة، اكتشفتها مركبة فويجر أثناء رحلتها الشهيرة. توجد لنبتون أربعة حلقات، لكن هذه الحلقات أقل كثافة وحجما بكثير من حلقات كوكب زحل، ويبدو أنها تتكون من جزيئات الغبار، وحتى الآن لا يعرف العلماء السبب الذي يجعل انتشار الغبار غير متساو فيها[1]. وأقماره هي: ناياد (Naiad). تالاسا (Thalassa). ديسبينا (Despina). جالاتيا (Galatea). لاريسا (Larissa). بروتيوس (Proteus). ترايتون (Triton). نيريد (Nereid). هاليمدي (Halimede). ساو (Sao). لاوميديا (Laomedeia). بسامثي (Psamathe). نيسو (Neso). المصادر[عدل]

بوابة النظام الشمسي
بوابة فلك

Walter, Elizabeth (April 21, 2003). Cambridge Advanced Learner's Dictionary (Second Edition ed.). Cambridge University Press. ISBN 0-521-53106-3. Littmann, Mark; Standish, E. M. (2004). Planets Beyond: Discovering the Outer Solar System. Courier Dover Publications. ISBN 0-486-43602-0. المراجع[عدل] ^ تعدى إلى الأعلى ل: أ ب ت ناسا - نبتون تاريخ الولوج 10 مارس 2010 [أخف] ع ن ت النظام الشّمسي

 الشّمس ·   عطارد · الزهرة ·   الأرض · المريخ · سيريس ·   المشتري ·   زحل ·   أورانوس · نبتون · بلوتو · هاوميا · ميكميك · إريس

كواكب · كواكب أقزام · أقمار طبيعيّة ( أرضيّة · مريخيّة · مشترييّة · زحليّة · أورانوسيّة · نبتونيّة · بلوتويّة · هاوميّة · إريسيّة) أجسام صغيرة: كويكبات (الحزام الرئيسي · حزام كايبر · القرص المتفرق) · مذنبات (سحابة هيلز · سحابة أورط) · نيازك انظر أيضاً في الأجرام السماوية أو قائمة أجرام النظام الشمسي، أو بوابة علم الفلك. تصنيفات: نبتونكواكب المجموعة الشمسيةعمالقة غازية

X mark.svg Not done - Submit your request only in English language. Anupmehra -Let's talk! 19:53, 10 April 2014 (UTC)

Semi-protected edit request on 10 April 2014[edit]

From its discovery in 1846 until the subsequent discovery of Pluto in 1930, Neptune was the farthest known planet. Upon Pluto's discovery Neptune became the penultimate planet, save for a 20-year period between 1979 and 1999 when Pluto's elliptical orbit brought it closer to the sun than Neptune.[37] The discovery of the Kuiper belt in 1992 led many astronomers to debate whether Pluto should be considered a planet in its own right or part of the belt's largduck I ate my pop tar Union defined the word "planet" for the first time, reclassifying Pluto as a "dwarf planet" and making Neptune once again the last planet in the Solar System.[40]

Composition and structure

X mark.svg Not done - It is unclear what changes you wish to bring about in the article. Submit your request in this form, "change X to Y". Anupmehra -Let's talk! 19:55, 10 April 2014 (UTC)

2751 × 3 ≠ 24764[edit]

"These altitudes are in the layer where weather occurs, the troposphere, which is estimated to rise to 2,751 km from the surface of the water–ammonia ocean. This number is a third of its equatorial radius."

I don't think 2,751 km × 3 equals 24764 km as it's given in the infobox?—Love, Kelvinsong talk 17:20, 22 June 2014 (UTC)

Apsis changes, and infobox implications[edit]

No set of elements, not even VSOP87 or Standishs' best fit, gives the perihelion and aphelion distances as accurately for the outer planets as people think. This is true of other quantities of the orbit as well. Those bodies just don't follow Keplerian orbits closely enough. In a lot of cases, especially Neptune, the derived numbers are good to only two signigicant figures. I've just used actual distances in edits in the Saturn, Uranus, and Neptune articles.

So what should become of the elements in these articles? A major overhaul is in order.

Saros136 (talk) 09:52, 18 July 2014 (UTC)

Switching Horizons to "Center: Solar System Barycenter (@0)" prevents major swings in the orbital elements. -- Kheider (talk) 02:36, 19 July 2014 (UTC)
I don't use Horizons much. Solex for elements. The oscullating elements still fluctuate, but that's not the problem here. The problem is is that the orbits of the outer planets don't follow Keplerian orbits well enough to allow us to deduce the apsis, circumference, time average, etc. with very high precision from any set of mean elements.

Saros136 (talk) 10:24, 19 July 2014 (UTC)

Oh wait, I see. Now that's more accurate than the mean elements. Saros136 (talk) 10:30, 19 July 2014 (UTC)
Perihelion distance now good to four significant figures, as compared to either nearest two or nearest four of them. A vast improvement. Saros136 (talk) 05:14, 21 July 2014 (UTC)