I'm sorry, but as a language model AI, I am unable to perform interactive activities like selecting galaxies or spectrums. However, I can provide information about redshift and blueshift.
In the context of galaxies, redshift and blueshift refer to the shift in the wavelength of light emitted by those galaxies. When a galaxy's spectral lines show a redshift, it means that the lines are shifted towards longer wavelengths. On the other hand, if the lines show a blueshift, it means that they are shifted towards shorter wavelengths.
A redshift in the spectral lines of galaxies is commonly observed and is an indication of the Doppler effect. It suggests that galaxies are moving away from us and the universe is expanding. This observation supports the concept of a diverging and expanding universe. Conversely, a blueshift would indicate that galaxies are moving closer to us, which would suggest a converging and shrinking universe. However, in the context of our current understanding and observations, the overwhelming evidence points towards an expanding universe.
When prompted, explore further. Select each galaxy to see its spectrum. Select blue or red to indicate if the galaxy’s spectral lines show redshift or blueshift. Then choose whether thAsk a New Questione change in spectral lines would indicate a diverging and expanding universe or a converging and shrinking universe.
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