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Index/Topics/Keck Telescope

Keck Telescope

A ground-based telescope used for astronomical observations.

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Jan 22, 2026

How far away would an object the size of an Apollo flag be visible with current telescopes?

An (roughly 1–2 meters across) is far too small to be resolved by any current Earth-based or space telescope aimed from Earth; diffraction and atmosphere-constrained resolution put the practical thres...

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