a1242de8   
   XPost: sci.physics.relativity, alt.astronomy   
   From: r_delaney2001@yahoo.com   
      
   On Apr 16,  Louis Boyd  wrote:   
   > > And, how do they measure the rotational velocity of other galaxies?   
   >   
   > It's relatively easy to measure the rotational velocity of other galaxys   
   > if their axis of rotation isn't pointed directly at at us.  Just lay the   
   > slit of a high resolution spectrograph across the long axis of a spiral   
   > or elliptical galaxy  and and measure the wavelength shift of the   
   > ionized gases approaching on one side and receding in the other.   
      
   They can resolve individual stars in foreign galaxies?   
      
   --   
   Rich   
      
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