Hubble bubble (astronomy)
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In astronomy, a Hubble bubble would be "a departure of the local value of the Hubble constant from its globally averaged value", or, more technically, "a local monopole in the peculiar velocity field,
The Hubble Space Telescope reveals many local anomalies in the generally homogeneous character of interstellar space, such as this galaxy (NGC 4526) and the supernova beside it (SN 1994D).
Dark energy
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In physical cosmology and astronomy, dark energy is a proposed form of energy that affects the universe on its largest scales. Its primary effect is to drive the accelerating expansion of the universe
Hubble bubble (astronomy)
…a "Hubble bubble" would accelerate away from Earth faster than the general expansion of the universe. This situation could provide an alternative to dark energy in explaining the apparent accelerating universe or contribute to explanations of the Hubble tension. In 1998, Zehavi et al. reported evidence in support…
Diagram representing a proposed model for the accelerated expansion of the universe due to dark energy
The equation of state of Dark Energy for 4 common models by Redshift. A: CPL Model, B: Jassal Model, C: Barboza & Alcaniz Model, D: Wetterich Model