Interesting MOND is really gaining ground on the evidence side of things these days the main issue MOND has is explaining why gravity's strength relationship with distance changes as MOND remains purely an observational theory. Will still probably take a long time to become more accepted with...
In the context of Pu 244 the most common due to its "long" lifetime of 80 Myrs as had been noted we have found it in sedimentary layers. Most notably is it has been found in the 2.5 to 2.6 million year old radioisotope layer which notably includes short lived radioisotopes like Fe 60 which...
This may actually tie in quite naturally with the paper I linked earlier https://iopscience.iop.org/article/10.1088/1475-7516/2016/10/022/meta.
In particular the proof of the No big crunch theorem shows that for any sufficiently large i.e. approximately flat or open initially expanding...
I fear you are at least partly correct regarding the expectation in physics that theories against the current mainstream paradigm have to reach a threshold of rigor to even consider or warrant a level of discussion this probably has to do with a large number of ill formed ideas having been...
While there are unresolved questions that need answering in general galaxy shape appears to have a lot to do with the overall history of that galaxy i.e. its past interactions. In the very least the large elliptical galaxies appear to form from the merger of two or more off aligned spiral...
As others have said the choice of sign convention is arbitrary as long as you are consistent in FLRW metric. That said there is an important and underappreciated caveat regarding the FLRW metric and that is it is only an exact solution under a universe with perfect homogeneity and isotropy...
The situation is more tricky than just verification because there are so many parameters and assumptions involved in various models, for one we don't even know for sure whether inflation really happened or not as there are other viable alternatives that can explain observations without inflation...
This is a bit tricky as there are model dependencies which effect when and how exactly stars first form and what properties they will have. Additionally we can't assume all such population III stars formed at the same time between different galaxiesThere is also an assumption dependent...
Hmm so one issue I see with this assumption is that while it works purely within the idealized special relativity is this no longer applies within the extension of special relativity to general relativity as spacetime curvature induces gravitational or cosmological doppler effects.
Hmm...
So sounds like these new abundances in general might resolve the solar metallicity discrepancy between asteroseismology and spectroscopic measurements? Raising the spectroscopic totals would help at least in the case of oxygen silicon and neon.
Yeah that always has bothered me I can understand it for crude back of the envelope calculations where you are checking to pursue whether somthing is worth pursing but I have been seeing some alarming stuff of late have you paid attention to the systematic problems with the type Ia supernovae...
@Bandersnatch Great Breakdown of the problems here the lack of understanding and recognition for the importance of uncertainty in all scientific measurements and predictions based on data.
There really is a lack of recognition among the public likely due to inaccurate portrayals of science in...
So I have been looking into paper for some years originally as part of a tangent related to my term paper on snowball Earth around 3 years ago and I think I have found a fair amount of fascinating complexity to the issue as these categories aren't clear cut and there have been and no doubt will...
Interesting conversation here discussing the problem with arguments that claim to "solve" the "Fermi paradox" or that the latter is even a thing given the sheer quantities of unknowns. As far as I am aware the only forms of this "paradox" with any validity given the largely unconstrainedsample...
Hmm I suggest you relook over these questions and what you want from us as there is a fair amount of nuance given the dynamic nature of Active Galactic Nuclei (AGN) and there are also still unresolved questions regarding how they form and evolve relative to their host galaxies.
In regarding...