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I always wonder. If we theoretically could know for each photon the direction vector and distance travelled, then could we make a collector that could image an exoplanet? Or is this simply impossible?


We actually already have multiple images of exoplanets. [1] and [2] were both taken with the Very Large Telescope in Chile. Granted, you can't see much beyond reddish blobs. But they are not that much worse than Hubble's images of Pluto [3].

We probably can't do much better with earth-based telescope arrays due to atmospheric distortions. But with satellite launch costs coming down we will see large telescope arrays in orbit in a couple decades, and those might do a lot better

[1] https://science.nasa.gov/resource/2m1207-b-first-image-of-an...

[2] https://www.eso.org/public/images/eso2011b/

[3] https://esahubble.org/images/opo1006h/




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