Big Bang

The expanding universe.

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BIG BANG

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Science

Story

13.8 Billion Years Ago

Big Bang Expansion

Verified. Empirically supported and rationally deduced.

Big Bang

The Big Bang was not an explosion into empty space. It was the expansion of space itself. From an early hot, dense state, the universe stretched and cooled, allowing matter, energy, forces, and eventually structure to emerge. The singularity remains speculative, but cosmic expansion is strongly supported by observation.

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Featured FAQ

Science

FAQ

Is the Big Bang singularity scientific or philosophical?

Philosophers: "It’s all speculation."

Scientists: "We’re working on it!"

Big Bang Singularity

The expansion of the universe is solid science. The singularity is not. It marks the point where our equations stop working, not where we suddenly know what “began everything.” Calling that boundary scientific certainty confuses mathematical breakdown with physical reality. Good thinking separates evidence from speculation without pretending speculation is failure.

The Expanding Universe

Observation before speculation.

The Big Bang is not an explosion in space, but the expansion of space itself. Galaxies recede, light stretches, and the cosmic microwave background preserves a faint afterglow of an early, hotter state. This section focuses on what we can measure — redshift, background radiation, large-scale structure — and how these observations map the universe’s growth over billions of years.

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Planets Galaxy Science Fiction Wallpaper Beauty Deep Space Cosmos Physical Cosmology Stock Photos.

Big Bang Structure Unification

The End of the Universe Explained

Michael Alan Prestwood March 22, 2024

We do not know the ultimate fate of the universe, but the leading ideas are that it expands forever, collapses and starts over, or ends in something more extreme.

big bang, black hole, supermassive star, galaxy, cosmos, physical, science fiction wallpaper.

Astronomy

The Expanding Universe Explained

March 15, 2024

ΛCDM remains the leading cosmological model because our current best measurements indicate gravity is not strong enough to stop the universe’s expansion.