Timeline for Dumbed-down explanation how scientists know the number of atoms in the universe?
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 10, 2017 at 20:18 | comment | added | user154997 | A more pedestrian version of @Pulsar's answer, addressing a connected question (the number of atoms is an intermediate result) has just been released on the Numberphile youtube channel: [How many particles in the Universe? ](youtube.com/watch?v=lpj0E0a0mlU). | |
| Jul 10, 2017 at 18:36 | history | edited | Pulsar | CC BY-SA 3.0 |
added 1 character in body
|
| Apr 13, 2017 at 12:39 | history | edited | CommunityBot |
replaced http://physics.stackexchange.com/ with https://physics.stackexchange.com/
|
|
| Nov 4, 2014 at 21:57 | comment | added | Pulsar | @WetSavannaAnimalakaRodVance No, I wasn't involved, I'm not even a cosmologist :-) The details are complicated, but it has to do with how baryons influence the propagation of sound waves in the early universe, which eventually are imprinted on the CMB. A great online tutorial is Wayne Hu's site. The key plot can be found here. | |
| Nov 4, 2014 at 0:03 | comment | added | Selene Routley | Most interesting indeed - a very thorough and simple explanation. "...detailed analysis of the Cosmic Microwave Background ..." is there a simple summary of how the proportion of baryons is estimated from this? That's quite a colossal paper and a colossal piece of work. Were you involved? | |
| Jun 17, 2013 at 13:08 | history | answered | Pulsar | CC BY-SA 3.0 |