Spectrum of Andromeda Galaxy - 搜索视频

SOLVED: The Andromeda galaxy is one of the very few galaxies that exhibits a blueshift in its spectrum. A hydrogen spectral line that is observed in our lab to have a wavelength of 656.28 nm is seen to have a wavelength of 656.06 nm in Andromeda's spectrum. What is the speed at which Andromeda is approaching Earth? At this speed, will Andromeda collide with Earth before or after the Sun turns into a white dwarf?

SOLVED: The Andromeda galaxy is one of the very few galaxies that exhibits a blueshift in its spectrum. A hydrogen spectral line that is observed in our lab to have a wavelength

VIDEO ANSWER: According to the question, the Andromeda galaxy and 31 are 2.5 million light years from the Milky Way. We have to find out how long it will take …

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