Use the scenario to answer the question. Unastronomer discovers a new Galaxy using a telescope. The astronomer wants to investigate how the galaxy is moving relative to the milky way galaxy in one or two sentences make a hypothesis about the movement of the galaxy and explain at least one way to test the hypothesis
Hypothesis: The new galaxy is moving away from the Milky Way galaxy due to the observed redshift of its light spectrum indicating a shift towards longer wavelengths.
Testing the hypothesis: The astronomer can analyze the galaxy's light spectrum using spectroscopy techniques to measure the redshift or blueshift of the spectral lines. If the observed spectral lines are shifted towards longer wavelengths (redshift), it would provide evidence supporting the hypothesis that the galaxy is moving away from the Milky Way galaxy.