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Measuring Fundamental Constants/radiotelescope question?

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bobw

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http://www.nrao.edu/pr/2005/constants/<br /><br /><blockquote><font class="small">In reply to:</font><hr /><p>The astronomers used the GBT to detect and study radio emissions at four specific frequencies between 1612 MHz and 1720 MHz coming from hydroxyl (OH) molecules in a galaxy more than 6 billion light-years from Earth, seen as it was at roughly half the Universe's current age. Each of the four frequencies represents a specific change in the energy level of the molecule.<p><hr /></p></p></blockquote><br /><br />I guess this is a dumb question but are those frequencies before or after red shift? <br /> <div class="Discussion_UserSignature"> </div>
 
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