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		<subject index="0" >Re(3): Companion</subject>

		<tonames index="0" >S194 06E real time observing</tonames>

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David A. Edwards writes:
>It matters a great deal if they are close in angular terms but not in
>true distance.  As well as knowing they appear to be close, you also need
>to know they truly are close.  Long exposure photos show the sky is
>almost jam-packed with galaxies - close in angular terms, but extremely
>distant from each other in terms of light years.  Galaxies at great
>separations cannot interact with each other. 
>
>
Could an angularly close pair of galaxies that are actually distant appear to be close if the instrinsic luminosities were different, thus making them appear to be actually close?