Wikipedia:Peer review/Oort cloud/archive1

Oort cloud[edit]

In order to get a number of articles added to the Solar System series, I have to get this article up to GA status fast. It's pretty flaccid as is so any ideas would be welcome. Serendipodous 12:15, 19 May 2007 (UTC)[reply]

Review by Spawn Man - First off, it's pretty cncerning that the opening is nearly as big as the rest of the text in the article - expansion of the article is needed, as at its current length, it will never make GA easily. The image captions seem a bit weird also, with both of them starting with "This image..." etc. Cut off that front bit & just have "The oort cloud..." etc. The end bit of the article is too overpowered by the large table - sufficiant text additions should solve that problem. Other than that, I don't have enough knowledge in the subject to make suggestions on factuality etc, so I'm sorry I couldn't be much more help. Cheers, Spawn Man 01:15, 21 May 2007 (UTC)[reply]
I want to make several observations. First, the range 50000-100000 AU is not right in light of the current understanding of the Oort cloud formation. The author contadicts himself when he states above range while calling Sedna an Oort cloud object (a~500 AU). The correct range is 50-50000 AU, which in turn can be subdivided into inner Oort cloud with 50-20000 AU (it is mentioned in the Structute section as Hill cloud and in the last section as inner Oort cloud) and outer one with 20000-50000 AU. Second, the outer cloud is the source of isotropic (long period >200 years) comets and probably also Halley type comets (see [arXiv.org/astro-ph/0512256], this paper provides a very good overview of the current knowlege about outer Solar System populations and should be read). However Oort cloud is definitely not a source of the short period comet population, because their Tisserand parameter and angular distribution are very different (see the link above). Third, the upper bound for the Ooort cloud mass is overestimated. The mass of all solids in the jovian region of Solar System is estimated to be lower then about 100 Earth masses, so current mass of the cloud is unlikely to exceed 3 Earth masses. Fourth, the phrase "however, as a mass greater than the combined masses of Uranus and Neptune (about 31 Earth masses) is inconsistent with those planets having scattered the comets to the Oort cloud in the first place" is strange, because Uranus and Neptun were incapable of such a scattering regardless of the cloud's mass as Origin section correctly states. So, I think, it's necessary at least to remove the internal contradictions, which I mentioned above, before this article can be promoted to GA status.Ruslik 08:45, 28 May 2007 (UTC)[reply]

Well since you obviously know more about this topic than I do, why don't you have a go? It shouldn't take more than 20 minutes. Serendipodous 08:56, 28 May 2007 (UTC)[reply]