https://en.wikipedia.org/wiki/Diffraction-limited_system There is a fundamental ... | Hacker News

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		throwaway2048 on July 22, 2020 \| parent \| context \| favorite \| on: First Ever Image of a Multi-Planet System Around a... https://en.wikipedia.org/wiki/Diffraction-limited_system There is a fundamental relationship between wavelength of light and focus-ability/magnification. You could in principle build an increasingly larger lense to get around the problem, but eventually that hits practical limits.

webmaven on July 22, 2020 | [–]

Can't you create ever larger arrays of reasonably sized lenses? And "array" just means "two or more widely separated by a known distance", so opposite sides of (polar?) orbit should work.

robin_reala on July 22, 2020 | [–]

For varying definitions of pratical. For example, you can use a star as a gravitational lens.

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