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by Anarch157a 554 days ago
A large enough telescope in space, with a coronagraph could, in teory, find such planets by direct imaging. Right now, I believe only JWST fits the bill, but using it for this purpose would interfere with other types of research, so the coronagraph us used only only to observe planets the wer already discovered by other methods.
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I’m pretty sure that new telescope being constructed in Chile will be large enough to directly image planets but I could be wrong.