[LMB] OT: Arecibo

Luke Bretscher rocketman0739 at gmail.com
Mon Nov 23 03:41:57 GMT 2020


On Sun, Nov 22, 2020 at 2:21 PM Howard Brazee <howard at brazee.net> wrote:
>
>
>
> > On Nov 22, 2020, at 1:00 PM, Luke Bretscher <rocketman0739 at gmail.com> wrote:
> >
> > Radar as opposed to radio? I'm not sure what distinction you're drawing.
>
> Normal radio telescopes just listen.   Radar  is when signals come from Arecibo and bounce off of whatever it is looking at, and come back.

Certainly a useful distinction, but it's a little confusing to call
the passive version just "radio" when both versions use radio waves.

Luke


More information about the Lois-Bujold mailing list