4. an astronomer records the spectra from three stars in three different galaxies. which star is probably…
4. an astronomer records the spectra from three stars in three different galaxies. which star is probably farthest away?\nstar a\nstar b\nstar c\ncannot be determined.
Answer
Brief Explanations:
In astronomy, the Doppler effect (red - shift) is used to determine the distance of stars. The greater the red - shift (the shift of spectral lines towards the red end of the spectrum), the faster the star is moving away and the farther it is. By comparing the spectral lines of the three stars (Star A, Star B, Star C) with the reference spectrum, we can observe the amount of red - shift.
Answer:
Star C