What wavelength range is used to map the motions of stars around Sagittarius A*?

Name: What wavelength range is used to map the motions of stars around Sagittarius A*?
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Infrared wavelength range is used to map the motions of stars around Sagittarius A*. This is because the Galactic Center is obscured by dust, so infrared radiation can penetrate through the dust clouds and provide us with a clear view of the stars and gas clouds that are close to Sagittarius A*.

What Wavelength Range Is Used to Map the Motions of Stars