According to the Big Bang theory, the universe is still expanding. This theory is supported by light spectrum observations that show what?
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a shift towards the blue end of the spectrum
a shift towards the yellow center of the spectrum
a shift towards the white center of the spectrum
a shift towards the red end of the spectrum
a shift towards the red end of the spectrum
This shift is known as redshift, and it indicates that galaxies are moving away from each other, supporting the idea of an expanding universe.