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  2. According to ancient and medieval science, aether (/ ˈ iː θ ər /, alternative spellings include æther, aither, and ether), also known as the fifth element or quintessence, is the material that fills the region of the universe beyond the terrestrial sphere. [1]

  3. Aug 19, 2023 · Aether was also known as “The Fifth Element” or quintessence, and the concept of aether was used in multiple theories scientists postulated to explain natural phenomena such as gravity and light. The origins of aether can be traced back to ancient Greece.

    • Lauren Dillon
  4. Feb 10, 2021 · Aristotle called it the fifth element. Alchemists thought it was the key to the philosopher’s stone. Scientists believed it was the stuff light moved through. But it never existed at all.

    • 4 min
  5. ether, in physics, a theoretical universal substance believed during the 19th century to act as the medium for transmission of electromagnetic waves (e.g., light and X-rays), much as sound waves are transmitted by elastic media such as air.

    • The Editors of Encyclopaedia Britannica
  6. According to ancient and medieval science, aether (alternative spellings include æther, aither, and ether), also known as the fifth element or quintessence, is the material that fills the region of the universe beyond the terrestrial sphere.

  7. According to ancient and medieval science, Aether (Greek αἰθήρ, aithēr), also spelled ether, is the material that fills the region of the universe above the terrestrial sphere. Aristotle included ίδέα, idea, as a fifth element distinct from the other four, Earth, Water, Air, and Fire.

  8. Aristotle added a fifth element, aether (αἰθήρ aither), as the quintessence, reasoning that whereas fire, earth, air, and water were earthly and corruptible, since no changes had been perceived in the heavenly regions, the stars cannot be made out of any of the four elements but must be made of a different, unchangeable, heavenly ...

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