Talk:Astronomical object

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Contents

[edit] Work list=

Here is the list to work on article assessment. I used the contents of this article and made a subsection for each column. The first thing we should do is to assign importance to each subject, and split this large list accordingly. Then we can work on the most important objects. This could also mean, I think, to add the names of the natural satellites for the planets in our solar system. Awolf002 17:55, 20 March 2006 (UTC)

[edit] Solar system

[edit] Simple objects

[edit] Stars by proximity

[edit] Stars by spectral type

[edit] Stars by luminosity class

[edit] Stars by stellar evolution

[edit] Intrinsic variables

[edit] Extrinsic variables

[edit] Compound objects

[edit] Star systems

[edit] Stellar groupings

[edit] Galaxies by morphology

[edit] Extended objects

[edit] what's that?

why this "list" or grid or anything is in article namespace? it seems that it is not an article..--Monk 13:25, 21 August 2006 (UTC)

As long as it's here, how about adding an introductory paragraph or two? Rfrisbietalk 19:23, 24 August 2006 (UTC)

[edit] Planet

The table needs some revision, because the 2006 redefinition of planet classifies Pluto as not a normal planet, but a dwarf planet. --Gray Porpoise 21:02, 24 August 2006 (UTC)

I have already updated the table by adding a dwarf planet section and the dwarf planets Ceres and 2003 UB313 as well as moving Pluto into that category. --Daniel Schibuk 13:34, 25 August 2006 (UTC)

[edit] Reorganization

Any thoughts on reorganizing this page on this layout → http://en.wikipedia.org/wiki/Template:WikiProject_Astronomical_objects/Structure , thanks, CarpD 9/6/06 I can give a shot at it, but it will take a little time...

Anythoughts on this layout. Ignore the color...
Universe
Filament List of Filaments
Void Region List of Void Regions
Cosmic microwave background radiation
Cosmic infrared background radiation
Galaxy Cluster List of Galaxy Clusters
  • Galaxy Cluster
  • Galaxy Supercluster
  • Galactic Satellite (system)
Thanks, CarpD 9/8/06
The page needs significant revision, but the organizational structure that you have proposed looks like it would create many problems. (I also strongly disagree with the organization of the proposed list and many of the items in the list; for example, the CMBR should be above filaments and voids, and the infrared background can probably be identified as originating from individual high-redshift galaxies once telescopes become advanced enough to resolve the galaxies.) I would prefer that the page be broken up into blocks labeled "Solar System", "Stars" (with exoplanets, planetary systems, and star systems folded into that list), "Star Clusters", "Interstellar Medium" (with nebulae folded into that list), "Galaxies", and "Extragalactic Structures". I also see no need to keep the bizarre block structure currently used by the astronomical object page; a list format may work just as well.
Please do not create a "list of filaments" or "list of voids" page. Such things generally are not identified. Creating such lists damages Wikipedia's usability as a reference for astronomy. (It would hurt rather than help.) George J. Bendo 07:51, 9 September 2006 (UTC)
List of solar system objects page already exist. I don't think that the Solar System is that special to warrent a section of its own in the Astronomical Objects page. Astronomical Objects is an ordinary list of things.
Also, the current list of voids and filaments, are they not recognized? [Atlas of the Universe], the list of Void names on Richard's page is not recognized? [The Great Wall], on Solstation.com. I ask, since I am unfimiliar with things beyong the galaxy.
As for the Cosmic Microwave and Infrared, I can reorganized it. Thanks, CarpD 9/9/06
Maybe the "List of solar system objects can be presented in a more generic way, with categories labeled "inner planets", "gas giants", "asteroids", etc.
On the subject of filaments and voids, most of these objects are really hard to identify well, few have clear identifications, and very few have real names. (We also do not want to be like HurricaneDevon and start making up our own names. That damages Wikipedia's credibility as a reference.) Even identifying groups and cluster members is difficult; see what I wrote on the M74 group of galaxies page or under environment on the Sombrero Galaxy page. Also, the Atlas of the Universe and its references contain inconsistencies on structure identification. (Moreover, the Atlas of the Universe is not a scientific reference, although it is a very good effort at attempting to illustrate these structures for the general public, and it does contain very good scientific references.) George J. Bendo 18:54, 10 September 2006 (UTC)
OK, let's try again. Also, do you prefer the Universe spanning the whole left column, or only for the extragalactic items?
Universe
Cosmic microwave background radiation
Cosmic infrared background radiation
Void Region List of Void Regions
Filament List of Filaments
Galaxy Cluster List of Galaxy Clusters
  • Galaxy Cluster
  • Galaxy Supercluster
  • Galactic Satellite (system)
Galactic
Galaxy types List of Galaxys
OR
Universe
Cosmic microwave background radiation
Cosmic infrared background radiation
Void Region List of Void Regions
Filament List of Filaments
Galaxy Cluster List of Galaxy Clusters
  • Galaxy Cluster
  • Galaxy Supercluster
  • Galactic Satellite (system)
Galactic
Galaxy types List of Galaxys
As for the Solar System, if it is requested to be on this page. Then it will be a seperate grid of only the Solor System objects. Thanks, CarpD


Most of the modifications in the above tables did not address my criticisms. I suggest this:

...

No strangely-structured color-coded tables. No Cosmic Infrared Background (which is not phenomenologically like the CMBR and should not be listed as an "object"). No links to lists of filaments and voids (which would be incredibly unhelpful). Just a list of stuff in general terms. Why can't we do something like that? George J. Bendo 17:19, 11 September 2006 (UTC)

OK, I was just following what the page already have, tables. But if tables are not wanted, then I will do without. And, isn't Cosmic Infrared Background probably made up of several infrared sources. Same as saying several stars together forms a Galaxy. So, would it not be considered an object? Thanks, CarpD 9/11/06
Thank you for agreeing to change the page layout. The analogy that you made with the Cosmic Infrared Background (CIB) is not quite correct. The CIB appears to be a uniform background simply because telescopes are not yet advanced enough (or large enough) to resolve the individual galaxies. Once most of the galaxies are resolved, it may no longer be considered a "background". In contrast, the stars in a galaxy are still stars regardless of whether they are resolved or unresolved, and the galaxy is still a gravitationally bound object regardless of whether the stars are resolved or not. In other words, the CIB is not a physical object, but stars and galaxies are. Does this make sense? George J. Bendo 08:16, 12 September 2006 (UTC)
Is CIB like Infrared Cirrus? Thanks, CarpD 9/12/06

[edit] Revert

Please do not revert without discussion. Mrwuggs 16:14, 16 October 2006 (UTC)

I agree that these should not be in the article, because they are pure speculation, as admitted in:
Nemesis (star)
Lilith (hypothetical moon)
Antichthon
Fifth planet
Nibiru (hypothetical planet)
Phaeton
Gaga (hypothetical moon)
Planet X
Or clearly false, as in
Mercury's moon
Vulcan (hypothetical planet)
Neith (hypothetical moon)
Tiamat (hypothetical planet)
so I have reverted. do not readd this information.
ST47Talk 18:14, 16 October 2006 (UTC)
Several hypotheticals are still present in the list. I think that the hypothetical and obsolete/false objects should be moved off to their own list, or visually separated on this one. To be honest, I'm not completely sure what exact role this article plays at all. -- Consumed Crustacean (talk) 22:07, 16 October 2006 (UTC)

The description at the top of the page states that these objects include hypothetical and proven astronomical objects. In addition, hypothetical astronomical objects is a subcategory under astronomical objects, and as Consumed Crustacean has pointed out, you have left several hypothetical objects on the list. There is already a list of hypothetical astronomical objects, so they do have their own list, but it still does not change the fact the hypothetical objects are still clearly part of this category. I think Crustean is right, and they should be marked differantly than the other bodies, perhaps in another color. Mrwuggs 22:46, 16 October 2006 (UTC)

It doesn't outright state that. It doesn't really state anything about what the devil this article is for, it just goes on some tirade about fringe science vs. bad science and such. I don't know what to do about the thing, there's a restructuring talk section right above this one, but it looks like no one followed through with it. Might have to adopt some ideas from it. I think, because lists containing everything else already exist, that it would be nice to keep this as a table. It should be wikified for easier editing though. Blergh. -- Consumed Crustacean (talk) 22:58, 16 October 2006 (UTC)

[edit] Don't panic!

Don't panic-I've deleted the link to The new order of celestial bodies, you don't have to do anything! Asteroidz R not planetz 19:52, 26 November 2006 (UTC)

[edit] How many planets are in the Solar system?

According to the Internationnal Astronomical Union, the new definition of a planet is "a celestial body that 1) is in orbit around the Sun, 2) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and 3) has cleared the neighbourhood around its orbit.

I can't help but nitpick the definition now that I've read it in full. "Celestial bodies" are the class of astronomical bodies that exclude Earth. Therefore, by this definition, Earth is not a planet. I propose moving "Earth" out of the list of planets and into a new category under "Planetary System" labeled "Other". It should remain there until the IAU gives a class of planetary objects that does include Earth.

Fedos 01:29, 10 March 2007 (UTC)fedos

The Earth is part of the cosmos, and is a "significant mass". It's a celestial body. There is no exclusion of Earth. Any anyways, if you read the definition, it specifically includes Earth. And besides all of that, see Wikipedia:Attribution and Wikipedia:Original research. -- Consumed Crustacean (talk) 04:54, 10 March 2007 (UTC)
Your definition of celestial body contradicts this page, which specifically says that Earth is not a celestial body; it doesn't fit with any dictionary definition, either. Also, the list is not part of the definition, it is an explanation of the definition. Even if it were, your argument is invalid. I cannot define a tree as a "woody plant with a single stem" and then immediately after say "here's a list of some common trees: Pine, Birch, Rhododendron". See, rhododendron's have multiple stems, therefore either my definition is wrong or my list is wrong. Being in the list does not exclude it from having to meet the definition. So, in the case of the IAU definition, either the list is wrong or the definition is wrong; and if the definition is wrong, we're stuck without a definition of what's a planet and what's not. Also note that Earth has not cleared its neighbourhood, neither has Mars, Jupiter, nor Neptune (Clearing the neighbourhood) -- Fedos 15:06, 17 March 2007 (UTC)
Earth, Mars, Jupiter and Neptune has certainly cleared their neighbourhoods. Neighbourhood here means the neighbourhood of the orbit of the planet around the sun, and the "clearing" is of asteriods. It matters not whether there are objects that are gravitationally bound to the planet itself (moons, that is). WLior 19:28, 26 April 2007 (UTC)


[edit] Astronomical objects and bodies

The article states the following:

Astronomical objects can be easily confused with astronomical bodies. The term "body" indicates a simple object, such as a planet. On the other hand, an astronomical object could be an asteroid belt.


Yet astronomical body redirects here. --Harald Khan Ճ 13:51, 30 December 2007 (UTC)


[edit] List of Broken Links

Hot Neptunes Oceanic planets Lithium dwarfs Methane dwarfs C-type stars S-type stars Shell stars Peculiar A-type stars Metallic A-type stars Thick disk stars Pulsating variables Symbiotic variables Rotating variables Unresolved binaries Circumstellar matter Galactic bars Galactic rings Thin disks Thick disks morphology Giant ellipticals Outer planet crossers White giants —Preceding unsigned comment added by Perseus101 (talk • contribs) 01:46, 18 May 2008 (UTC)