Big Bang
The expanding universe.
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BIG BANG
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Science
Story
Expanding Universe
Galaxies emerged quickly from an initially simple universe. They started within a few hundred million years of the Big Bang. Observations confirm that gravity wasted little time turning primordial gas into organized systems, even before features we now consider typical. Such as central supermassive black holes commonly found in galaxies.
Featured Quote
Featured FAQ
Science
FAQ
Did a Canadian discover the Big Bang’s afterglow 25 years early?
Scientific Discovery
History records the discovery of the Big Bang as 1965, but decades earlier in 1941, a Canadian first observed it, but didn’t know it. This demonstrates why observation alone is incomplete without understanding. A theory without evidence is incomplete. A measurement without meaning is incomplete. Progress happens when thought and observation meet.
Big Bang
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.
Deep-Dive Articles
The End of the Universe Explained
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.
The Expanding Universe Explained
ΛCDM remains the leading cosmological model because our current best measurements indicate gravity is not strong enough to stop the universe’s expansion.
Must-Reads
Big Bang
The End of the Universe Explained
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 ...
Astronomy
The Expanding Universe Explained
ΛCDM remains the leading cosmological model because our current best measurements indicate gravity is not strong enough to stop the universe’s expansion.
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