21K views · 137 reactions | Li-Fi, short for Light Fidelity, is a...

Why Is Space So Dark Even With Billions of Stars? This puzzle is known as Olbers’ Paradox, named after the German astronomer Heinrich Olbers, who popularized it in the 19th century. The paradox asks: if the universe is infinite, static, and filled uniformly with stars, then every line of sight should eventually hit a surface. The night sky, in that case, ought to blaze as brightly as the Sun itself. Clearly, that’s not what we observe, and so the paradox forces us to question our assumptions abo