What specific task can telescopes like ALMA perform that optical telescopes cannot regarding star formation regions?

Answer

Peer through the dust to map cold gas/dust structures and accretion disks

ALMA operates at millimeter/submillimeter wavelengths, allowing researchers to peer through the obscuring dust to map the initial density fluctuations and observe the development of the accretion disks surrounding the nascent stellar objects.

What specific task can telescopes like ALMA perform that optical telescopes cannot regarding star formation regions?
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