[time-nuts] Pulsars make a GPS for the cosmos

mc235960 mc235960 at gmail.com
Mon Sep 30 04:46:37 EDT 2013


Le 30 sept. 2013 à 09:19, Hal Murray a écrit :

> 
> jimlux at earthlink.net said:
>> You also get direction, so for a "navigation" system, you can figure out
>> where you are. 
> 
> I'm still missing the big picture.
> 
> If I'm working off direction, why are pulsars interesting?  Why radio vs 
> optical?  There are lots of bright stars out there.  Why not use them for 
> navigation?
> 

  
  I think it is a question of improving accuracy. Comparing a group of pulsars "tick" arrival times being better than comparing apparent star positions, which  depends on camera resolution ,and also , if position relative to earth is required, against a base catalog. Pulsars make that easier.


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