Question

in 1929 hubble used light spectra as evidence to indicate the motion of distant galaxies. in the image below show the differences of light spectra of different galaxies compared to a laboratory reference to uses as comparison, or control group. describe the differences between nearby stars and galaxies compared to distant stars and galaxies by using the spectral lines

Explanation:

The spectral lines of nearby stars and galaxies are closer to the laboratory - reference spectral lines in terms of wavelength. Distant stars and galaxies show a redshift, where the spectral lines are shifted towards longer wavelengths compared to the laboratory reference. This redshift indicates that distant objects are moving away from us, and the more distant they are, the greater the redshift (as seen in the very distant galaxy having the most significant redshift among the examples).

Answer:

The spectral lines of nearby stars and galaxies are less redshifted compared to distant stars and galaxies. The spectral lines of distant objects are shifted towards longer wavelengths relative to the laboratory - reference spectral lines, with the most distant objects showing the greatest shift.