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Darkenergy

All articles tagged with #darkenergy

astronomy1 month ago•5 min saved

Cosmic Collapse in 33 Billion Years: A New Model Rewrites the Universe’s Fate

A new arXiv cosmological model called the axion dark energy (aDE) framework argues that dark energy could evolve rather than stay constant, slowing the expansion until the Universe reverses into a contraction and a Big Crunch roughly 33.3 billion years from now. The model aligns with DES/DESI observations but implies a dramatic shift from the prevailing eternal-acceleration view, underscoring the need for more data to validate or refine this scenario.

via The Daily Galaxy|

#astronomy #axion #bigcrunch

science1 year ago•4 min saved

James Webb Telescope Data Challenges Current Understanding of Universe's Expansion

The James Webb Space Telescope (JWST) has provided new data that intensifies the "Hubble tension," a discrepancy in measurements of the universe's expansion rate. While the cosmic microwave background suggests a Hubble constant of about 67 km/s/Mpc, measurements using Cepheid variable stars indicate around 73 km/s/Mpc. JWST's findings align with the latter, suggesting the universe's expansion may involve unknown physics, such as early dark energy or new properties of dark matter, challenging current cosmological models.

via ZME Science|

#cosmology #darkenergy #hubbleconstant

physics2 years ago•2 min saved

"Unveiling Dark Energy Origins Through Beam Balance Designs"

Researchers have developed a prototype for an ultra-precise beam balance instrument that aims to measure the interaction between vacuum fluctuations and gravitational fields, potentially shedding new light on the origins of dark energy. The instrument, designed to operate at extremely low temperatures, utilizes quantum effects triggered by vacuum fluctuations to detect minuscule changes in weight of a high-temperature superconductor sample. Initial tests show promise, with researchers confident that the final experiment will be sensitive enough to pick up the interaction between vacuum fluctuations and gravitational fields.

via Phys.org|

#beambalance #darkenergy #physics