+**Aether** (from Ancient Greek: αἰθήρ) was, in ancient and medieval science, a pure, luminous [Substance](/wiki/substance) believed to fill the cosmos beyond the earthly sphere. Later, the [Luminiferous Aether](/wiki/luminiferous-aether) was a hypothesized medium through which light waves propagated, a concept eventually disproven by modern physics.
+## See also
+- [Classical Elements](/wiki/classical-elements)
+- [Vacuum](/wiki/vacuum)
+- [Light](/wiki/light)
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