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Loading contentHow the Universe began, how it evolved, and how cosmologists measure it — from the Big Bang and cosmic inflation to dark matter, dark energy, and black holes. Every topic is labelled by its scientific consensus, and established science is never mixed with speculation.
37 concepts · 4 models · 17 object classes · the Universe timeline →
Every topic in this encyclopedia is labelled by how well established it is. Established science, strong evidence, active research, scientific debate, and speculation are kept distinct — never conflated.
The scientific study of the Universe as a whole — its origin, contents, structure, and fate.
How the Universe began and evolved through its earliest epochs.
The unseen matter that shapes galaxies and the cosmic web.
The mysterious component accelerating the expansion of the Universe.
From event horizons to the first black-hole image.
The dense remnants left when stars die.
Einstein's theories of space, time, and gravity — the foundation of cosmology.
Ripples in spacetime and the new astronomy they opened.
How gravity built galaxies, clusters, and the cosmic web.
From the first stars to today's galaxies and their active cores.
The oldest light in the Universe and what it reveals.
The history of the cosmos, from the Big Bang to the present, in order.
The standard model and the alternatives — kept honestly distinct.
Where cosmologists actively disagree about the evidence.
The great unsolved problems at the frontier of cosmology.
The observatories and surveys mapping dark energy, structure, and spacetime.
Times are current best estimates and carry real scientific uncertainty; far-future entries are model-dependent projections, not certainties.
Cosmological parameters, measurements, and consensus classifications are drawn from authoritative sources — the Planck Collaboration, NASA, ESA, ESO, the LIGO and Event Horizon Telescope collaborations, DESI, SDSS, and peer-reviewed literature. Nothing is fabricated; theories, discoveries, scientists, and observatories already in the graph are reused, not duplicated. See the source quality page.