https://en.wikipedia.org/wiki/Diffraction-limited_system https://en.wikipedia.org/wiki/Diffraction-limited_system The first problem is that we are limited to o

https://en.wikipedia.org/wiki/Diffraction-limited_system https://en.wikipedia.org/wiki/Diffraction-limited_system The first problem is that we are limited to observing that photons that originate at the source; there's no way for us to bounce some small-wavelength photons off of our target and collect them. So we could do long-baseline interferometry, instead. You need to spread your sensors over a large area and keep synchronized timing. https://en.wikipedia.org/wiki/Radio_telescope#Radio_interferometry https://en.wikipedia.org/wiki/Radio_telescope#Radio_interfer... Naturally, you can build bigger systems in space. https://en.wikipedia.org/wiki/Space_Interferometry_Mission#Optical_interferometry https://en.wikipedia.org/wiki/Space_Interferometry_Mission#O... If we sent out satellite telescope stations to orbit the sun, with really good communications and clocks, we might be able to create a virtual lens that's really big: https://en.wikipedia.org/wiki/Laser_Interferometer_Space_Antenna https://en.wikipedia.org/wiki/Laser_Interferometer_Space_Ant...