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? $\endgroup$ Sep 26, 2018 at 0:13
  • $\begingroup$ @MagicOctopusUrn revised $\endgroup$
    – Muze
    Sep 26, 2018 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? $\endgroup$ Sep 26, 2018 at 1:47
  • $\begingroup$ @MagicOctopusUrn let us say Earth. $\endgroup$
    – Muze
    Sep 26, 2018 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, 2018 at 3:11

1 Answer 1


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.


You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .