Respuesta :
Answer:
Star S has radial motion
Explanation:
Because the radial motion stracture is kinda similar to hydrogen spectrum(I'm guessing,only lol)
The spectrum of Star S is compared to a reference hydrogen spectrum. It is concluded that Star S has transverse motion.
What is hydrogen spectrum?
Hydrogen spectrum is used to show the quantized electronic structure of an atom.
If Star S is not showing radial motion. So, it is not moving away or towards the Earth.
To learn more about Hydrogen spectrum here
https://brainly.com/question/6836691
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