Possibly the best way on our planet to amplify the tiniest signal with less noise is to use a battery powered electron tube.
This is done by using a high transconductance variable mu tube such as an EF183 at very low voltages.
The heater and plate can be supplied with 3.7V only and a few Megs resistor is needed between 3.7+ and control grid to free electrons and have an anode (plate) current of >100 micro amperes.
This can make a nice portable single battery electron tube pre pre amplifier. Pleiades filters can be used as input and output transformers. It's a beauty to "hear" the absence of noise from battery clean dc supplies.
Could this be used to detect a most distant object in universe by being the front end of a radio telescope helping to unveil borders of the past?
Georg Neumann used lower than specified heater voltage and small plate voltage on the VF14 tube on the legendary U47 Telefunken Neumann microphone and changed our planet musically.
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