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science12h ago
How the electromagnetic spectrum opened our eyes to the universe
- The article explains how the electromagnetic spectrum reveals different cosmic details, from gamma rays to radio waves.
- Radio waves are highlighted as both a medium for Earthly communication and a messenger from space.
- Infrared observations with the JWST help capture galaxies as they appeared billions of years after the big bang.
- The Square Kilometre Array (SKA) is introduced as a future giant radio observatory to probe the early universe.
- The article notes that combining observations across wavelengths helps test ideas about galaxy growth and cosmology.
- The piece emphasizes that humans are 'born fluent in only a single language of light' but the universe is multilingual.
- Historical milestones trace how Newton, Herschel, and later technology expanded the visible spectrum.
- The article highlights the universal reach of the spectrum for studying planets, stars, and cosmic history.
- The author cites Europa’s plumes and UV traces as examples of how different wavelengths reveal planetary processes.
- The piece links SETI and multi-wavelength astronomy as a collaborative approach to find life beyond Earth.
- The article closes by portraying the spectrum as a Rosetta Stone for translating unseen cosmic messages.
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