Thanks again for your splendid newsletter! Learning about DESI, ELO and the Euclid devices was great.
About Dark Energy:. Do things accelerate as they fall into a gravity well? If so, could gravity accelerate the expansion of the universe if our little sphere of expansion was inside a spherical gravity source and approaching it? So our known universe of matter and energy is born in the center of some preexisting "container" so to speak? But that hypothesis wouldn't explain the data showing a weakening of the force would it. Alas! Another theory falls 😉
There's actually a possible explanation to dark energy that's kind of the reverse of what you suggest. If we happen to be in the middle of a giant void, then it might look like the universe is expanding faster close to us, and slower far away. That would match the observations we see and trick us into thinking the expansion of the universe is accelerating. But, of course, most cosmologists think such a vast void is very unlikely to exist.
Thanks again for your splendid newsletter! Learning about DESI, ELO and the Euclid devices was great.
About Dark Energy:. Do things accelerate as they fall into a gravity well? If so, could gravity accelerate the expansion of the universe if our little sphere of expansion was inside a spherical gravity source and approaching it? So our known universe of matter and energy is born in the center of some preexisting "container" so to speak? But that hypothesis wouldn't explain the data showing a weakening of the force would it. Alas! Another theory falls 😉
Thanks! Glad you enjoyed it.
There's actually a possible explanation to dark energy that's kind of the reverse of what you suggest. If we happen to be in the middle of a giant void, then it might look like the universe is expanding faster close to us, and slower far away. That would match the observations we see and trick us into thinking the expansion of the universe is accelerating. But, of course, most cosmologists think such a vast void is very unlikely to exist.
I agree! But maybe using Shannon info theory some kind of an explanation might be found..
Or maybe we could consider the possibility that physical laws are not stable through time. Yikes!
Changing physical laws over time might be even more trouble than dark energy ;)
Yes indeed. Anisotropy and inhomogeneity haunt my astrophysical dreams.
That and false vacuums!