I’m looking for the most up-to-date information about the density parameter (i.e., the density of the universe relative to the critical density). As a layman, I don’t know how to navigate the relevant literature. Hence, I would like to ask if someone here could provide me with some references.
I’m looking for some fairly detailed information (even though it may be difficult for me to understand as, you know, a layman). That is, in addition to the best estimate, I would also like to understand the evidence for that estimate and the level of uncertainty. If there are recent textbooks or popular texts that cover this, that would be great; but I’m also interested in references to research papers.