Recent content by windy miller

thanks

I understand inflation is thought to predict primordial gravitational waves although their strength is undetermined by the theory with some models of inflation predicting them to be strong and others so weak they can never be detected. However , this paper claims that if we detect a background...

Thanks for taking the time to respond but my post was not really trying to have the concept of the HZ explained but rather to try and get some history . So the questions are 1. did anyone predict the existence of exoplanets based on athropics or not 2 if they did when did they? 3 when was the...

Earth's distance from the sun is said to lie in a small Habitable Zone (HZ) . How did it come to be in such a fortunate position? It seems that someone in the past could have asked this question and concluded on the basis of anthropics there must be a large number of planets in our galaxy. My...

Alan Guth says it about 3 minutes into this video But he is talking about the flatness problem and says the initial expansion rate. So that's what i guess they must be the same thing, are they?

So my understanding is that the claim that the expansion rate of the universe is delicately fine tuned and the flatness of the geometry is delicately fine tuned is one and the same claim. Is that correct. I am aware that inflation can solve this problem but that is not my questions. Many thanks

As I understand it, the flatness problem of Bob Dicke, says a flat universe in unstable and so has to be set very precisely in the early universe to give us the flat universe we see today. Is this the same problem as saying the expansion rate had to be finely tuned and if so how are the two...

Thanks for that comparison, it is helpful. But what are the biggest problems for the theory ? Do you know?

Thanks for this i forgot i had laready posted about it back in 2017 so i reread that post but i don't think anyone gave a particularly insightful answer. As to the issue with google scholar yes there next four years were additional papers. I just did a search on the last three years and got 865...

Many years I read a lay person friendly article on Horava Lifshitz gravity. https://www.scientificamerican.com/article/splitting-time-from-space-evidence/ Im curious to know how has this theory developed? Is it taken seriously? What are the outstanding problems ? Have there been any impressive...

Well he also thought the universe was infinite, I'm not sure there was observational evidence for that either but people like to speculate. As for documentation, I have read many sources that refer to his views but I can't claim to have read his original texts. But here is an example of a brief...

Didn't Nicholas of Cusa (who was alive about 200 years before Galileo saw Venus through his telescope ) think of planets as bodies with living beings on them?

Does anyone know when it was first realized that a heliocentric model of the cosmos should show the phases of Venus in the way Galileo saw them in the 17th century.?Was it known in the time of Aristarchus or did people only realize this was a consequence of helicoentrism later on, perhaps only...

thanks for this, much appreciated.

Ive read that Casual Set theory says that spacetime is made of spacetime atoms. But doesn't LQG says something similar? Or is just space atoms in LQG? A laypersons expansion fo the main difference would be very much appreciated? Also does Cause Set theory assume spacetime is fundamental rather...