Yes to both, though large deviations would require distance scales larger than anything we can observe.Huej said:If the Universe were not expanding uniformly (i.e., at the same rate in all places), then would different places would see a different Hubble law than we do? And if If the extragalactic distance scale changed, would the Hubble constant change?
Hubble's Law is a fundamental principle in astronomy that states the farther away a galaxy is from Earth, the faster it appears to be moving away from us. This is known as the redshift effect and is caused by the expansion of the universe.
By observing the redshift of galaxies and using the relationship between their distance and recession velocity, Hubble's Law provides evidence for the expansion of the universe. This means that the space between galaxies is increasing over time, causing them to appear to move away from each other.
Yes, Hubble's Law can be used in conjunction with other measurements to estimate the age of the universe. By measuring the rate of expansion and knowing the current size of the observable universe, scientists can calculate the age to be approximately 13.8 billion years.
While Hubble's Law is generally observed to hold true, there are some exceptions. These include galaxies that are close enough to Earth to have their redshift affected by local gravitational forces, and galaxies that are moving toward us rather than away from us.
Since Hubble's Law was first proposed in the 1920s, our understanding of the expanding universe has evolved significantly. With advancements in technology and observations, we now have a more precise understanding of the rate of expansion, as well as the role of dark energy in accelerating this expansion. Additionally, we have a better understanding of the structure and composition of the universe as a whole.