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RELATIVITY
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History
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1848
Doppler Effect Observed for Stars
Light Waves
The Doppler effect was extended from sound to light when astronomers noticed that starlight shifts in frequency, revealing stellar motion through subtle changes in color.
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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.
Relativity
Einstein-based spacetime, gravity, and motion.
Spacetime as geometry.
Classical physics describes motion, energy, and interaction through continuous systems and deterministic laws. From Newtonian mechanics to thermodynamics and electromagnetism, it models a world where causes produce predictable effects. It remains the foundation for engineering, planetary motion, and everyday physical intuition.
Deep-Dive Articles
The Nature of Time
Time is not a ticking metronome; it is the ledger of causation.
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
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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Updated Articles
Live well. | Philosophy of Mind | Relativity
The Nature of Time
Time
Time is not a ticking metronome; it is the ledger of causation.
Sun 2 Jun 2024
(2 years ago)
Updated 1 day ago.