Can an image of a person using a radio telescope see a person from far away? Could a radio telescope be made to see someone walking on Mars?


  • $\begingroup$ How close is it to the guy? Can we put a camera 10 ft away from him and capture the data then relay it to an intermediate satellite? I think you need to revise your question a bit. You use a lot of terms and don't explain them fully in terms of the true question you're asking. Is this telescope on earth? $\endgroup$ – Magic Octopus Urn Sep 26 '18 at 0:13
  • $\begingroup$ @MagicOctopusUrn revised $\endgroup$ – Muze Sep 26 '18 at 1:41
  • $\begingroup$ Once again where is the observer-- I assume on earth? In orbit around earth? Orbit around mars? 10 ft from his face? $\endgroup$ – Magic Octopus Urn Sep 26 '18 at 1:47
  • $\begingroup$ @MagicOctopusUrn let us say Earth. $\endgroup$ – Muze Sep 26 '18 at 1:57
  • $\begingroup$ I think the main problem here is "Will the person be emitting significant amounts of radio waves"? $\endgroup$ – Phiteros Sep 26 '18 at 3:11

In brief: you cannot resolve details of an object on a scale less than roughly a wavelength or two. The distance to the object only marginally affects this problem.

So take a look at the wavelengths your radiotelescope is capable of receiving and compare with dimensions of interesting "features" on a human body.

Further, as the comments pointed out, unless the human is either emitting radio-wavelength energy in significant amounts (unlikely) or is being "painted" by a large emitting source (as active radar systems do), you won't get any signal in the first place.


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