This experiment will try to measure the orbital velocity of the Earth using the Doppler shift measurements in the spectrum of the star, Arcturus. Moreover, this experiment will become a measurement of the accuracy of such technique in measuring the orbital velocity of the Earth. Overall, the experiment will familiarize the students with the concept of Doppler shift and other related concepts.
This experiment was performed using personal measurements from the given two spectrograms of the Arcturus specifically 6 months apart. The upper spectrogram labeled “a” from the given spectrograms represents the red-shifted spectrogram while the bottom spectrogram labeled “ ...