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OlgaM077 [116]
3 years ago
15

How scientist determine the shape of the Milky Way galaxy

History
1 answer:
Yuki888 [10]3 years ago
6 0

Astronomers could use radio telescopes to accurately map the positions of these O and B stars and use the Doppler shifts of the radio spectrum to determine their rates of motion. When they did this with many stars, they were able to produce combined radio and optical maps of the Milky Way's spiral arms.

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