Concept explainers
ToExplain:The way astronomers can determine that our galaxy, the Milky Way is moving towards Andromeda, a neighbouring galaxy.
Explanation of Solution
Introduction:
An astronomer can use the phenomena called Dopler Shift to study about the movement of astronomical objects relative to Earth. In Dopler Shift they use the light spectrum which shows the two shifts: blue shift and red shift.
When the source of the light coming towards the observer, then the
If the object moves away from an observer, then the wavelength of emission light will increase and shift towards red end, and known as red shift.
Conclusion:
As our galaxy Milky Way and the Andromeda, the neighbouring galaxy are moving towards each other, hence the astronomers will observe the blue shift.
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