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Cosmology

Investigating the origin, evolution, fundamental structure, and ultimate fate of the entire universe.

Explore by Cosmology

Simons Observatory Large Aperture Telescope at 5,200 m on Cerro Toco, Chile, surveying CMB B-mode polarization.

May 12, 2026

Simons Observatory CMB First Light: B-Mode Polarization Hunt at σ(r)=10⁻³

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Conceptual illustration of the cosmic dipole anomaly showing an asymmetrical distribution of dark matter and quasars against the cosmic microwave background.

May 11, 2026

The Cosmic Dipole Anomaly: A Superhorizon Isocurvature Lagrangian Resolving the 5.4σ CMB-Quasar Matter Dipole Tension

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Visualization of cosmic birefringence rotating CMB polarization vectors

May 11, 2026

Cosmic Birefringence: Chern-Simons Axions and the ACT DR6 Anomaly

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Abstract visualization of complex scalar fields in an inflationary cosmological collider

May 10, 2026

Scalar Chemical Potential Cosmological Collider: A CMB Lagrangian

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Conceptual diagram of Fab-Four self-tuning inflation showing scalar-tensor fields generating CMB temperature anisotropies.

May 9, 2026

Fab-Four Self-Tuning Inflation: Lagrangian Origin of CMB Anisotropy

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Cosmic microwave background map and inflationary universe expansion diagram

May 8, 2026

ACT DR6 Inflation Crisis: n_s = 0.9743 Excludes Starobinsky R²

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Cinematic illustration of LHS 3844 b, a dark airless basaltic super-Earth facing a red dwarf star, overlaid with a glowing JWST mid-infrared spectrum ribbon.

May 7, 2026

Webb First Direct Exoplanet Surface Spectroscopy: LHS 3844 b Reveals Dark Airless Basaltic Super-Earth

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Conceptual visualization of CMB polarization B-modes over a radio telescope observatory

May 5, 2026

ACT DR6 + BICEP/Keck Constraints Rule Out Major Inflation Models: The Hunt for Primordial B-Modes

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Visualization of cosmic microwave background polarization twisting through an axion field

May 5, 2026

ACT DR6 Cosmic Birefringence: Axion Parity Violation at β=0.215°

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FAQs about Cosmology

Cosmology is the scientific study of the entire universe. It asks questions about how the universe began, how it has evolved, and what its ultimate fate will be.

The Big Bang Theory is our best explanation for how the universe started. It states that the universe began as an extremely hot, dense point about 13.8 billion years ago and has been expanding and cooling ever since.

These are the two biggest mysteries in cosmology. Dark matter is an invisible substance that provides extra gravity to hold galaxies together. Dark energy is a mysterious force that is causing the expansion of the universe to accelerate.

Because light takes time to travel, looking at distant galaxies is like looking back in time. Telescopes like Hubble and James Webb allow us to see galaxies as they were billions of years ago, giving us clues about the early universe.