Tag: #darkenergy

NASA Launches Nancy Grace Roman Space Telescope, Headed for L2 to Study Dark Energy and Exoplanets

NASA’s Nancy Grace Roman Space Telescope launched from Kennedy Space Center, starting a three-month cruise to Sun–Earth L2 to study dark energy, dark matter and exoplanets.

#nasa, #space, #telescope, #exoplanets, #darkenergy

Preprint reports >3σ evidence for w = −1 ‘phantom crossing’ in CPL dark‑energy fits

A UT Dallas preprint using an “optimal redshift” method finds CPL-model fits to current data show w = −1 crossing at >3σ for several dataset combinations.

#cosmology, #darkenergy, #astrophysics, #desi

Reanalysis Challenges DESI’s Claimed Signal for Dynamical Dark Energy

A new arXiv reanalysis finds DESI’s apparent hint of evolving dark energy is concentrated in one redshift bin and vanishes under alternate statistical checks.

#darkenergy, #desi, #cosmology, #arxiv

DESI preprint reports 1% measurement of the universe’s expansion at redshift 2.33

DESI's new preprint reports a 1% measurement of cosmic expansion geometry at z=2.33 from the Lyman‑alpha forest, tightening high‑redshift anchors for H0 and Ωm.

#cosmology, #desi, #lymanalpha, #darkenergy

Preprint Suggests Dark Matter–Dark Energy Interaction Could Explain DESI Anomalies

A revised arXiv preprint argues DESI-era tensions with ΛCDM may be explained by dark matter–dark energy interactions rather than evolving dark energy.

#cosmology, #darkenergy, #darkmatter, #desi

DESI completes five-year survey; will continue through 2028 to probe dark energy

The Dark Energy Spectroscopic Instrument finished its original five‑year survey, mapping 47M+ objects. DESI will continue through 2028 to test whether dark energy evolves.

#astronomy, #darkenergy, #cosmology, #desi