Universe edit
This article was the winner of the ACID on 3 January 2007. I was wondering how to improve this article to FA status. Right now it is pending GA status, but I think that it could use some more suggestions. Diez2 16:12, 25 January 2007 (UTC)
- Here's a few comments that I hope are useful:
- It looks like many of the sections still need citations, and the last paragraph of the "Shape" section needs a neutral tone.
- I'm a little bothered by the entire lead section. The second through the fourth paragraphs are really a discussion about what is the "observable universe" and that could easily be placed in a section by itself. Also the lead isn't really "capable of standing alone as a concise overview of the article" as is stated on the Wikipedia:Lead section page.
- The article could do with an in-depth discussion of the "fractal structure" of the Universe, ranging from individual, gravity-bound objects such as stars and planets, up to the largest scale with (super) voids and clusters. There's plenty of references on the topic.
- Some additional illustrations may be helpful.
- Thanks. — RJH (talk) 18:13, 25 January 2007 (UTC)
Hi - some comments
- the lead in section needs quite a bit of work, it is too big and covers too many ideas, without summarising important facts reveiled lower.
- In composition the CP violation origin of matter is just a unproved hypothesis.
- How about including the (current) density of photons in the unuverse.
- Comoving does not get explained well enough in the light of how many times the term is used.
- The chemical composition part fails to say how this information determines the density and time available for nucleosynthsis.
- "The concept of parallel universes is understood only when related to string theory." Surely there are other concepts outside of string theory!
- There seems to be no reference to the history or development of the idea of universe.
Alternate theories apart from big bang don't get a mention. GB 08:37, 30 January 2007 (UTC)
According to the general theory of relativity, some regions of space may never interact with ours even in the lifetime of the universe, due to the finite speed of light and the ongoing expansion of space. For example, radio messages sent from Earth may never reach some regions of space, even if the universe would live forever; space may expand faster than light can traverse it.
This example as given does not support the general theory of relativity. If light is a constant and is moving outward with the expansion of the Universe (no matter when the light wave was created)then at some time in the future the lightwave will "catch up" with the regions of space at the futherest reaches. If it didn't then the expantion of the Universe is happening at greater than the speed of light.