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Life Cycle of a Star: Stages, Diagram, and How Stars Die
From a collapsing gas cloud to a white dwarf, neutron star or black hole, follow the physics that sets a star’s path and the observations that test it.
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Cosmology
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Why Is There More Matter Than Antimatter? Could Neutrinos Explain It?
The matter excess is measured; its origin is unresolved. Leptogenesis links that problem to hypothetical heavy neutrinos. A 2026 calculation shows why a particle with almost no role in light-neutrino…
Explainer
Dark Matter vs Dark Energy: What Is the Difference?
Dark matter and dark energy are inferred from different observations. One supplies unseen gravitating matter and helps structure form; the other accounts for accelerated expansion in standard cosmology. This comparison…
Explainer
What Is Dark Energy?
Dark energy is a name for an observation, not an explanation of it. The observation is that cosmic expansion is speeding up, and the whole question is whether the thing…
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How Do We Know How Bright a Supernova Was?
Type Ia supernovae are the rulers cosmology uses to measure the expanding universe, and they are usually called standard candles, as if they all shone equally brightly. They do not.…
Explainer
What Does a Dark Matter Detector Actually Measure?
On 26 August 2026, two kilometres under Ontario, SuperCDMS began collecting its first scientific data. No detector can see dark matter. What it measures is heat and charge, two numbers…
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