Depending on where we look, the universe is expanding at different rates. Now, scientists using the James Webb and Hubble space telescopes have confirmed that the observation is not down to a measurement error.
This is amazing news. It's like being shown that Neutonian physics are wrong, so now we have the ability to come up with a better model, then massive advancements in technology can occur.
We have a very limited view of the universe so it's no surprise that our theories are often wrong or incomplete. The beauty of science is that when a theory proves inadequate, it gets replaced with a more complete one.
It seems odd to me that the universe would be expanding at the same consistent spherical shape.
I've seen plenty of explosions and they never look like that.
The big bang, which consisted of literally all matter in the universe would surely be no different.
see also : https://en.m.wikipedia.org/wiki/Hubble's_law Hubble tension
In the 21st century, multiple methods have been used to determine the Hubble constant. "Late universe" measurements using calibrated distance ladder techniques have converged on a value of approximately 73 (km/s)/Mpc. Since 2000, "early universe" techniques based on measurements of the cosmic microwave background have become available, and these agree on a value near 67.7 (km/s)/Mpc. (...)
(...) The most exciting possibility is new physics beyond the currently accepted cosmological model of the universe, (...)
It's like the stars when observed at veryx2 far distance they start to behave weird. Blinking a bit faster than normal this might cause the reason for much faster expansion when calculating. Entropy suppose to be improbable right but at far distance all those improbable they probably all eventually add up. Just my thought anyway.
Why couldn't this still be "big bang"? Look at a grenade for example. When it explodes, a shock wave expands from it in a near perfect sphere, but the fragments previous packed inside of it explode out at different speeds depending on their mass.
If you were in the center of that explosion, measuring the speed of fragments traveling away from you, they'd travel at different speeds. Only the initial shockwave would be constant.
From my limited understanding, the discrepancy comes from the two ways to measure the universe's expansion: calculation from cosmic microwave background and calculating a cepheid variable, which uses pulsating stars (pulsars?)
Isn't it more likely that one, or both, ways of measuring are wrong? As in, they're not useful for measuring the universe's rate of expansion?
It's almost like cephid variable measurement is a shitty metric for measuring universe expansion because you're not actually measuring the edge of the universe just the rate of travel of two objects.
Seeing the universe expanding at different rates could just mean we're not as close to the center as we thought, and the parts further away from the center are moving faster. That's my layman's hypothesis though