Physical cosmology learning sites

AI Thread Summary
Several users recommend websites for learning about physical cosmology, highlighting resources like Physics Forums, which offers a variety of textbooks and articles. Another suggested site is Cosmology 101, featuring numerous articles and textbook-style content, with an emphasis on the common misconceptions section. Additionally, a tutorial from UCLA's astronomy department is noted as a valuable resource. These sites collectively provide a solid foundation for anyone interested in the study of physical cosmology. Engaging with these resources can enhance understanding of the subject significantly.
Entr0py
Messages
102
Reaction score
1
Hi all! Where are some good places on the Internet where I can learn about physical cosmology? Specifically any good websites that are devoted to physical cosmology that you know about?
 
Space news on Phys.org
https://en.wikipedia.org/wiki/Recombination_(cosmology) Was a matter density right after the decoupling low enough to consider the vacuum as the actual vacuum, and not the medium through which the light propagates with the speed lower than ##({\epsilon_0\mu_0})^{-1/2}##? I'm asking this in context of the calculation of the observable universe radius, where the time integral of the inverse of the scale factor is multiplied by the constant speed of light ##c##.
Why was the Hubble constant assumed to be decreasing and slowing down (decelerating) the expansion rate of the Universe, while at the same time Dark Energy is presumably accelerating the expansion? And to thicken the plot. recent news from NASA indicates that the Hubble constant is now increasing. Can you clarify this enigma? Also., if the Hubble constant eventually decreases, why is there a lower limit to its value?
Back
Top