[LMB] OT: Arecibo

Howard Brazee howard at brazee.net
Sun Nov 22 20:34:24 GMT 2020



> On Nov 22, 2020, at 1:24 PM, Markus Baur via Lois-Bujold <lois-bujold at lists.herald.co.uk> wrote:
> 
>> Normal radio telescopes just listen.   Radar  is when signals come from Arecibo and bounce off of whatever it is looking at, and come back.
> 
> which is why it is useful only for short range targets like asteroids or planets

I tried to take a photo of the Andromeda galaxy, but there was something wrong with my flash.



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