Calculating distance of galaxy from Milkyway

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SUMMARY

The discussion centers on calculating the distance of a galaxy from the Milky Way using redshift measurements. The observed redshift (Z) is calculated using the formula Z = (observed wavelength - emitted wavelength) / emitted wavelength, resulting in a value of 0.101. This redshift indicates the galaxy is moving away from the Milky Way, but the discussion highlights that redshift alone does not directly provide distance without applying Hubble's Law. Hubble's Law relates redshift to distance, establishing a crucial connection between these two concepts.

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A galaxy is observed to have a significant redshift in all of its spectral lines. The line normally seen at a wavelength of 327 nm is instead observed at 360 nm. How far is this galaxy from the milkyway

My approach


All I can calculate here is the red shift based on the formula

Z= observe wavelength- emitted/ emitted


Z= 360-327/327
=0.101

This has nothing to do with distance or does it?
 
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