Talk:Zeldovich pancake

Crêpe de Zeldovitch
Just to tell you that this article has now been translated into french and thank all the contributors. Hop ! Kikuyu3 (talk) 19:19, 29 May 2010 (UTC)
 * Merci beaucoup! Regards, RJH (talk) 23:12, 9 June 2011 (UTC)

A problem in the first paragraph
Nobody writes, so guess nobody reads here. But here goes anyway. Am I confused or is there an order of causation problem in the first paragraph? How can we speak of a collapse of a gas ellipsoid as occuring before the formation of hydrogen atoms in the recombination era, as is written here? I.e. when there is no hydrogen, how can there be any gas in an ellipsoid before that? Comments please. Idealist707 (talk) 22:41, 9 June 2011 (UTC)
 * I believe the primordial fluctuations are conjectured to date back to the period of cosmic inflation. Also, there was baryonic matter in the Universe before hydrogen atoms formed (protons, electrons, &c.) Perhaps it should say 'plasma/gas' rather than 'gas'? Regards, RJH (talk) 23:11, 9 June 2011 (UTC)

Thanks kindly. I was wrong on two points. People do read this talk. And although it would have helped (me) if it said, "the neutral form of hydrogen was formed"; but then everybody but myself understood that; since that's what re-combination means. Soooory" It's always that decision: how many support words at the cost of conciseness. Idealist707 (talk) 07:40, 10 June 2011 (UTC)

Zombie scientists
"In 1989, Zel'dovich and S. F. Shandarin showed that..." says the second paragraph. However, the man's actual Wikipedia page has his date of death in 1987. Either one is mistaken in some way or there's some worrying developments in late soviet research.


 * Zel'dovich and Shandarin did publish a paper in 1989 (https://doi.org/10.1103/RevModPhys.61.185). 3pi14 (talk) 12:55, 7 June 2018 (UTC)