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by martinpw
1622 days ago
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> you would need a lens with a diameter of about 4e10 meters. Probably a mirror rather than a lens. And actually all you need is two mirrors separated by 4e10 meters, not a single mirror of that diameter: https://en.wikipedia.org/wiki/Astronomical_interferometer The problem would be the amount of signal you can collect. Might be interesting to do a calculation of the number of photons that would be detectable at that distance per unit solid angle to figure out roughly how big the mirrors would have to be to capture an image in a reasonable amount of time. |
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