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You can think about “what if there was something else here, like gravity, before the Big Bang?” Maybe even, what if two gravity strings crossed and they caused the Big Bang?
originally posted by: gortex
a reply to: Klassified
Our "understanding" of the universe has never been set in stone anyway.
I agree but you have to admit the ages of both our galaxy and the Universe are recited like Gospel by many in the science community.
originally posted by: LeeMich83
Assuming the Universe continuously expands might be a mistake. It might pulse, like a heart beat.
originally posted by: peskyhumans
They are going to keep bending and distorting their model like a bowl of spaghetti rather than ever admit the model is wrong'''
Is our universe endless? Without beginning, without end? That's what this suggests. There was no big bang.
originally posted by: TEOTWAWKIAIFF
a reply to: quintessentone
And add to the mystery is some more observations (data), that contradict other proclamations that this cannot be so… from newatlas.com
Startling new evidence suggests black holes drive expansion of universe.
Basically, some galaxies have supermassive black holes and they don’t retain objects according to their gravitational attraction but seem to be pushing objects away!
Again, this is science and more data means that what we thought was simple and already known is not exactly explained by our limited understanding.
This is great stuff to try to understand even at the armchair level!
Contrary to what we might think, a vacuum isn’t totally empty – random quantum fluctuations produce what’s known as vacuum energy, which exerts an outward pressure that could work against gravity and drive the expansion of the universe. In some models, vacuum energy could be found in black holes, and in the new study the team found the first observational evidence of this.
The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs.
Not at all, really, since the ages of both have been adjusted many times over the past several decades.
One reason we launched the JWSTelescope is because we didn't have data on such old galaxies, and in some respects, accurate data on them is still lacking. They didn't take actual spectra of the galaxies which we would need to have precise and accurate data, but I expect they eventually will, so that's one thing that could change the results somewhat.
originally posted by: gortex
Or rather the discovery of 6 "mature" Galaxies by a team of scientists looking at the Webb Deep Field data from last year may have broken our understanding of the Universe , its age and how Galaxies form.
Black holes currently grow faster than they evaporate because the very cold universe is still not cold enough to let them evaporate. They will absorb more energy from the low temperature of the universe than they will lose from evaporation for many billions of years. Eventually the universe should cool enough to allow the evaporation, but even then, only the lightest or least massive black holes will evaporate at first. For a black hole to evaporate now, it would need to have a mass less than that of the moon and it's possible no such black hole exists...the black holes we know of have a mass at least 3 times that of the sun or so.
originally posted by: LeeMich83
The latest theory is actually that black holes slowly evaporate.
Every black hole we know of in the Universe today is still growing, but that growth is going to reach a finite maximum. After that, Hawking radiation will triumph...
Black holes will grow and grow and grow for billions of years before they start decaying faster than they're growing, and even once they do, they have incredible lengths of time before they're gone.