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Cosmology
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The universe including astronomy, physics, and structure.
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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.
Cosmology
Story
“Everything is in flux.”
Heraclitus
500 BCE
Impermanence
Change is the only form of permanence that exists.
Cosmology
Quote
Why hasn’t Voyager been damaged by space dust?
Space
Cosmology < Science
Cosmology
FAQ
Will the night sky have stars nearly forever?
The Expanding Universe
Our galaxy is part of the Local Group, over 50 galaxies, gravitationally bound, forever.
Cosmology
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