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Cosmology

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

Explore by Cosmology

3D visualization of the cosmic web illustrating a spatial dipole and anisotropic expansion breaking the Cosmological Principle.

July 22, 2026

Is the Cosmological Principle Broken? A Field-Theoretic Test of Cosmic Anisotropy

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Abstract cosmological visualization showing the baryon acoustic oscillation structures and a vacuum phase transition boundary.

July 21, 2026

The Negative Neutrino Mass Problem: Reconciling DESI DR2 and CMB Lensing via Sign-Switching ΛsCDM

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Scientific visualization of a lopsided universe exhibiting cosmic dipole anisotropy and a tilted Bianchi V metric grid.

July 20, 2026

Is the Universe Lopsided? Tilted Bianchi Cosmology and the Khronon Field

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Conceptual visualization of CMB Silk damping and neutrino decoupling in the early universe.

July 19, 2026

Pinning N_eff to 2.99: How ACT, SPT & Planck Ruled Out Dark Radiation

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A conceptual 3D visualization of a cosmic string creating a spacetime distortion and Kaiser-Stebbins temperature shift against the cosmic microwave background.

July 18, 2026

Cosmic Strings and the CMB: A Field-Theoretic Analysis of Topological-Defect Anisotropies and the Nanohertz Gravitational-Wave Tension

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A conceptual 3D visualization of CMB spectral distortions and Silk damping dissipating into the primordial photon bath.

July 17, 2026

CMB Spectral Distortions: The μ-Distortion Window Into Inflation

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Visualization of cosmic microwave background radiation gravitationally lensed by dark matter filaments

July 16, 2026

CMB Lensing vs. the S8 Tension: Did ACT DR6 and KiDS-Legacy Just End Cosmology's Structure-Growth Crisis?

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A conceptual visualization of the Early Dark Energy scalar field altering the expansion of the primordial universe.

July 15, 2026

Axion Early Dark Energy: The Pre-Recombination Scalar Field Resolving the Hubble Tension

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A celestial sphere showing the cosmic microwave background with a clear hemispherical power asymmetry.

July 14, 2026

The Hemispherical Power Asymmetry: A Field-Theoretic Analysis of the CMB's Lopsided Sky

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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.