Star called alpha nittany is moving away from earth

Reference no: EM13198310

3. A star called Alpha Nittany is moving away from the Earth with a velocity of 200 km/sec.

a. If we measure the spectrum of this star with a telescope on the Earth, what will the wavelength of the H-alpha line be in the star's spectrum?

b. If you were an observer living on a planet in orbit around Alpha Nittany, what would you measure the radial velocity to be of the Earth's Sun? So, what wavelength do you expect the H-alpha line in the Sun's spectrum to be as observed by an observer near Alpha Nittany?

Reference no: EM13198310

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