SCIENTIFICAMERICAN  |  Space & Physics

How to Really See the Stars

如何真正看到星星

A view of the red giant star π1 Gruis as a small reddish dot in deep space.

A view of the red giant star π1 Gruis as a small reddish dot in deep space.

2025-11-28  1227  困难
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The stars in the night sky are a bit farther away; the nearest one to us, Proxima Centauri, is roughly 280,000 times more distant than the sun! This makes it appear correspondingly smaller through a telescope—infinitesimally smaller, in fact, appearing as only a point of light. When an object appears this way, we say it’s unresolved; when it’s apparently big enough to exhibit an actual shape, then it’s resolved.

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