Here is a bit more information about the particular star they are observing:

For ALMA’s first observations in its new and most powerful mode, researchers pointed the antennas at HL Tauri — a young star, about 450 light-years away, which is surrounded by a dusty disc. The resulting image exceeds all expectations and reveals unexpectedly fine detail in the disc of material left over from star birth. It shows a series of concentric bright rings, separated by gaps.

This is very exciting as it will give us unprecedented evidence of how planets form.  And at 450 light years away, on a galactic scale that is fairly close!