The Hubble Tension
The Hubble tension is a genuine and growing puzzle in cosmology: two careful ways of measuring how fast the universe is expanding give answers that…
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Cosmic Inflation
Cosmic inflation is the hypothesis that, in the first tiny fraction of a second after the Big Bang, the universe expanded at an almost unimaginable…
Dark Matter: The Leading Theoretical Framework for Missing Mass in the Universe
Dark matter is the leading theoretical framework proposed to explain gravitational effects observed in galaxies and galaxy clusters that cannot be…
The Big Bang
The Big Bang is the prevailing cosmological theory of how the universe began. It holds that the universe started about 13.8 billion years ago in an…