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I finally uploaded and now linked an image of the lunar diurnal libration that I observed in 2018. I also have an anaglyph version and a cross-eye version that actually show that one can create a 3d-image from these two photos, but I thought the animated gif going back and forth between the evening and morning image was best to illustrate the diurnal libration itself.
KJ, 2024-05-06
Looks like the cross-hairs, in the center of the image, etch out the shape of an "Analemma" over time
—Preceding
unsigned comment added by
136.1.1.101 (
talk) 20:41, 14 December 2004
The article would benefit if molecular libration was also explained. -- Mfrosz 06:44, 25 July 2006 (UTC)
It would be nice if the article stated where this number comes from. I'd have a stab at some approximate calculations, but I'm busy right now. Shinobu 16:14, 14 April 2007 (UTC)
Also, because the ratio of the moon's diameter to its distance from earth is non-negligible, at any given moment an earth observer can see slightly less than half the surface. —Preceding unsigned comment added by 131.193.179.146 ( talk) 03:10, 4 October 2007 (UTC)
According to this source, the moon also wobbles slightly about its centre of gravity. Shouldn't something about his be included in the article? Kelisi 01:13, 22 July 2007 (UTC)
I am unhappy about this explanation, and about the analogy with the seasons. Since there is tidal locking, the same polar tilt should be exhibited at all times (all things being equal, i.e. if we ignore the OTHER types of libration listed). In other words, the 59% arises from the other types, with this one not contributing. — Preceding unsigned comment added by 92.2.211.127 ( talk) 13:24, 24 October 2012 (UTC)
This article seems to talk an awful lot about the Moon, even though libration is by no means Moon-specific. Researchers just used the librations of Mercury to determine it has a molten core (
http://www.news.cornell.edu/stories/May07/margot.mercury.html) So I think the definitions of longitudinal and latitudinal librations should be more general.
brithans 2008/11/09 12:34 (UTC)—Preceding
undated comment added 17:35, 9 November 2008.
I think more pertinent is the fact that despite this article (per its title) purporting to cover libration in general, it has only the vaguest description of libration in general: "In astronomy, libration is a particular relative motion of orbiting bodies". That description could apply to plenty of other relative motions that are not libration. I wouldn't propose that Libration of the moon needs to be moved to a separate article, but this article does need to describe what libration is in general. I personally came here via links from Jupiter Trojan, which has nothing to do with the moon, so a description of only lunar libration is frustrating. Huttarl ( talk) 16:34, 18 November 2010 (UTC)
The article should mention whoever it was that discovered lunar librations. — MiguelMunoz ( talk) 00:30, 4 September 2010 (UTC)
I'm removing
-- which rendered as
-- bcz that template is not for careless misspellings or typos, but for actual confusions: in this case,
Liberation & vibration are so familiar that those confusions are too implausible to burden the HatNote with. The "libation" case is not so obvious, but
Even so, i might have left it, pending discussion, if it had been the first {{
distinguish}} entry placed, but in fact the three seem to have been added in the order they appear, with the
bad judgment of distinguishing from "Liberation" having set the bar as low as is imaginable, and serving to encourage misunderstanding of what kind and degree of confusion would justify additional entries. So i consider my case against "{{distinguish|Libation}}" decisive, pending anyone's eloquent defense of that HatNote.
--
Jerzy•
t
06:32, 6 September 2010 (UTC)
There doesn't seem to be any discussion as to the cause of lunar libration. Might it be due to gravitational waves, as have recently been proven experimentally? - Paul2520 ( talk) 13:25, 18 March 2016 (UTC)
Gravitational waves are exotic, but libration can be understood with Newtonian physics. LunaJim ( talk) 00:41, 18 April 2021 (UTC)
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The 6.7 degrees should be visible to the unaided eye. — Preceding unsigned comment added by 2A00:23C0:7C80:8401:981D:286D:6C7:9A8D ( talk) 16:50, 18 June 2018 (UTC)
I do not have a planetarium program but such a program might be able to generate an image of a full year's libration as one graph. The position in the moon's sky of the Earth as seen from the center of the near side of the moon should be recorded by its Cartesian coordinates for 365 or more positions in the year and the points connected by a drawn curve which would be a graph of libration. The citation for the image could be the name of the planetarium program. I for one would like to see the graph. - Fartherred ( talk) 17:19, 8 June 2019 (UTC)
I just created a new page for libration point orbit, associated of late with the JWST.
My mission was merely to cover a small, evident gap, but for as long as I attended to this, I came to the impression that this page should be renamed lunar libration and a top level libration page (not necessarily as reductive as a dab) could dispatch the various weakly related libration subpages. It's somewhat problematic in this instance that celestial mechanics is shot through with various and sundry libratory jitterbugs, lunar libration merely being the most parochial.
Just a suggestion based on short contact. — MaxEnt 23:34, 20 September 2022 (UTC)
This is the
talk page for discussing improvements to the
Libration article. This is not a forum for general discussion of the article's subject. |
Article policies
|
Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL |
![]() | This ![]() It is of interest to the following WikiProjects: | ||||||||||||||||
|
I finally uploaded and now linked an image of the lunar diurnal libration that I observed in 2018. I also have an anaglyph version and a cross-eye version that actually show that one can create a 3d-image from these two photos, but I thought the animated gif going back and forth between the evening and morning image was best to illustrate the diurnal libration itself.
KJ, 2024-05-06
Looks like the cross-hairs, in the center of the image, etch out the shape of an "Analemma" over time
—Preceding
unsigned comment added by
136.1.1.101 (
talk) 20:41, 14 December 2004
The article would benefit if molecular libration was also explained. -- Mfrosz 06:44, 25 July 2006 (UTC)
It would be nice if the article stated where this number comes from. I'd have a stab at some approximate calculations, but I'm busy right now. Shinobu 16:14, 14 April 2007 (UTC)
Also, because the ratio of the moon's diameter to its distance from earth is non-negligible, at any given moment an earth observer can see slightly less than half the surface. —Preceding unsigned comment added by 131.193.179.146 ( talk) 03:10, 4 October 2007 (UTC)
According to this source, the moon also wobbles slightly about its centre of gravity. Shouldn't something about his be included in the article? Kelisi 01:13, 22 July 2007 (UTC)
I am unhappy about this explanation, and about the analogy with the seasons. Since there is tidal locking, the same polar tilt should be exhibited at all times (all things being equal, i.e. if we ignore the OTHER types of libration listed). In other words, the 59% arises from the other types, with this one not contributing. — Preceding unsigned comment added by 92.2.211.127 ( talk) 13:24, 24 October 2012 (UTC)
This article seems to talk an awful lot about the Moon, even though libration is by no means Moon-specific. Researchers just used the librations of Mercury to determine it has a molten core (
http://www.news.cornell.edu/stories/May07/margot.mercury.html) So I think the definitions of longitudinal and latitudinal librations should be more general.
brithans 2008/11/09 12:34 (UTC)—Preceding
undated comment added 17:35, 9 November 2008.
I think more pertinent is the fact that despite this article (per its title) purporting to cover libration in general, it has only the vaguest description of libration in general: "In astronomy, libration is a particular relative motion of orbiting bodies". That description could apply to plenty of other relative motions that are not libration. I wouldn't propose that Libration of the moon needs to be moved to a separate article, but this article does need to describe what libration is in general. I personally came here via links from Jupiter Trojan, which has nothing to do with the moon, so a description of only lunar libration is frustrating. Huttarl ( talk) 16:34, 18 November 2010 (UTC)
The article should mention whoever it was that discovered lunar librations. — MiguelMunoz ( talk) 00:30, 4 September 2010 (UTC)
I'm removing
-- which rendered as
-- bcz that template is not for careless misspellings or typos, but for actual confusions: in this case,
Liberation & vibration are so familiar that those confusions are too implausible to burden the HatNote with. The "libation" case is not so obvious, but
Even so, i might have left it, pending discussion, if it had been the first {{
distinguish}} entry placed, but in fact the three seem to have been added in the order they appear, with the
bad judgment of distinguishing from "Liberation" having set the bar as low as is imaginable, and serving to encourage misunderstanding of what kind and degree of confusion would justify additional entries. So i consider my case against "{{distinguish|Libation}}" decisive, pending anyone's eloquent defense of that HatNote.
--
Jerzy•
t
06:32, 6 September 2010 (UTC)
There doesn't seem to be any discussion as to the cause of lunar libration. Might it be due to gravitational waves, as have recently been proven experimentally? - Paul2520 ( talk) 13:25, 18 March 2016 (UTC)
Gravitational waves are exotic, but libration can be understood with Newtonian physics. LunaJim ( talk) 00:41, 18 April 2021 (UTC)
Hello fellow Wikipedians,
I have just modified one external link on Libration. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
This message was posted before February 2018.
After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than
regular verification using the archive tool instructions below. Editors
have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
RfC before doing mass systematic removals. This message is updated dynamically through the template {{
source check}}
(last update: 5 June 2024).
Cheers.— InternetArchiveBot ( Report bug) 09:16, 15 May 2017 (UTC)
The 6.7 degrees should be visible to the unaided eye. — Preceding unsigned comment added by 2A00:23C0:7C80:8401:981D:286D:6C7:9A8D ( talk) 16:50, 18 June 2018 (UTC)
I do not have a planetarium program but such a program might be able to generate an image of a full year's libration as one graph. The position in the moon's sky of the Earth as seen from the center of the near side of the moon should be recorded by its Cartesian coordinates for 365 or more positions in the year and the points connected by a drawn curve which would be a graph of libration. The citation for the image could be the name of the planetarium program. I for one would like to see the graph. - Fartherred ( talk) 17:19, 8 June 2019 (UTC)
I just created a new page for libration point orbit, associated of late with the JWST.
My mission was merely to cover a small, evident gap, but for as long as I attended to this, I came to the impression that this page should be renamed lunar libration and a top level libration page (not necessarily as reductive as a dab) could dispatch the various weakly related libration subpages. It's somewhat problematic in this instance that celestial mechanics is shot through with various and sundry libratory jitterbugs, lunar libration merely being the most parochial.
Just a suggestion based on short contact. — MaxEnt 23:34, 20 September 2022 (UTC)