Recent content by Physics1218

I'm sorry this is an old discussion but I was in Peru so I couldn't have internet to access it. I understand now that one of the primary evidences for dark matter is that H is going down slower than 1/a. In a universe without dark energy, H would be constrained to either 1/a or faster if matter...

Thanks for the response. Although from what I can see, the post by Bandersnatch is in conflict with yours. Bandersnatch said, (It should be noted that Bandersnatch was referring to a universe in which there wasn't matter and energy.) In a universe with matter, then H would have to be lower...

Thank you for the response guys. I would lastly just like to confirm that I'm correct in believing that the primary evidence of dark energy is in that the Hubble sphere is not constrained to 1/a.\ Furthermore, I would like to thank you again Bandersnatch for the explanation.

Sorry, I phrased that question strangely. After reading your response, I came to the conclusion that the primary evidence for dark energy is that the the evolution of H is not constrained. Why does H have to evolve like this in a universe without matter or dark energy?

Thanks for that post, Bandersnatch. It was really elaborate and insightful. I would just like to ask you two questions. As you explained, contemporary evidence points out that the Hubble constant will eventually evolve into 1/144% every million years and stay there. Currently the Hubble constant...

I had questions concerning the Hubble Sphere and while researching why the Hubble sphere doesn't shrink as the universe accelerates someone informed me that the universe isn't truly accelerating in its expansion as we might conventionally think. They informed me that the universe was...