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When an object like a star or galaxy is moving relative to us, we can observe that the spectral lines are shifted relative to the direction that the object is moving with respect to us. If the object and observer are getting closer, the lines will be shifted a bit towards the blue end of the spectrum (blueshifted); moving apart will shift them towards the red end of the spectrum (redshifted). The interesting thing is that all of the lines will be shifted the same amount and the line pattern will be preserved so we can still identify what atoms or compounds are responsible. As the Earth orbits the Sun, a star is observed to have the dark line spectra below. Label when the earth is moving towards, away from and parallel to the star.

When an object like a star or galaxy is moving relative to us, we can observe that the spectral lines are shifted relative to the direction that the object is moving with respect to us. If the object and observer are getting closer, the lines will be shifted a bit towards the blue end of the spectrum (blueshifted); moving apart will shift them towards the red end of the spectrum (redshifted). The interesting thing is that all of the lines will be shifted the same amount and the line pattern will be preserved so we can still identify what atoms or compounds are responsible. As the Earth orbits the Sun, a star is observed to have the dark line spectra below. Label when the earth is moving towards, away from and parallel to the star.

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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ASTR101 Astronomy Laboratory V. Task 4: Doppler Shift Doppler Shift and Direction Grist When an object like a star or galaxy is moving relative to us, we can observe that the spectral lines are shifted relative to the direction that the object is moving with respect to us. If the object and observer are getting closer, the lines will be shifted a bit towards the blue end of the spectrum (blueshifted); moving apart will shift them towards the red end of the spectrum (redshifted). The interesting thing is that all of the lines will be shifted the same amount and the line pattern will be preserved so we can still identify what atoms or compounds are responsible. As the Earth orbits the Sun, a star is observed to have the dark line spectra below. Label when the earth is moving towards, away from and parallel to the star.
Transcribed Image Text:ASTR101 Astronomy Laboratory V. Task 4: Doppler Shift Doppler Shift and Direction Grist When an object like a star or galaxy is moving relative to us, we can observe that the spectral lines are shifted relative to the direction that the object is moving with respect to us. If the object and observer are getting closer, the lines will be shifted a bit towards the blue end of the spectrum (blueshifted); moving apart will shift them towards the red end of the spectrum (redshifted). The interesting thing is that all of the lines will be shifted the same amount and the line pattern will be preserved so we can still identify what atoms or compounds are responsible. As the Earth orbits the Sun, a star is observed to have the dark line spectra below. Label when the earth is moving towards, away from and parallel to the star.
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