摘要: The light emitted from distant stars, captured by Earth-and space-based telescopes, reveals many details about the evolution of our universe. Images from the Hubble Space Telescope and the recently commissioned James Webb Space Telescope are stunning and easy to appreciate visually, but they are all the more remarkable for what they tell us about history. Some of the most transformative astrophysical observations come from using such instruments to peer further and further away, which allows us to look further and further back in time, providing a direct observational window into the history of the universe as it unfolds. Looking upward toward the stars is not quite as useful in revealing the evolution of our own 4.57-billion-y-old Solar System. The light emitted from the star we orbit takes a paltry 8 min and 20 s to reach our eyes, and even gazing out to the Kuiper Belt in the far stretches of our Solar System …
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