Light Is How Astronomers Read the Story of the Universe
Almost everything we know about the cosmos is conveyed by photons traveling across vast distances
![Light Is How Astronomers Read the Story of the Universe](https://static.scientificamerican.com/dam/m/283f9d5defdf539a/original/EH7G19_WEB.jpg?w=1200)
Almost everything we know about the cosmos is conveyed by photons traveling across vast distances
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