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Cosmic Microwave Background

Atacama Cosmology Telescope Research Findings Standard Rulers Observational Astronomy Cosmic Structure Formation Evidence for Dark Energy Universe Expansion Density of Matter Topology Kinematic Sunyaev-Zel’dovich Effect Sigma-8 Tension Elliptical Galaxies Big Bang Foreground Contamination Baryon Acoustic Oscillations Planck 2018 Data Planck Observations CMB Experiments CMB Anomalies Dark Energy Early Universe Measurements Planck Satellite Observations Radiation Hubble Constant Observational Techniques

Gravitational-Lens Time Delays Deliver New Hubble Constant, Deepening the Tension

A TDCOSMO analysis of eight lensed quasars measures 71.6 km/s/Mpc with 4.5% precision, pointing to larger samples to reach decisive 1–2% tests.

Atacama Cosmology Telescope Issues Final Data Release, Confirms Planck-Like Hubble Value and Tightens Model Constraints

Ground Telescopes Capture Polarized Microwave Light From Cosmic Dawn