A triple protostar system surrounded by a disk with a spiral structure has been observed by astronomers using the Atacama Large Millimeter/submillimeter Array. Combined ALMA and VLA image of the L1448 IRS3B system, with two young stars at the center and a third distant from them; spiral structure in the dusty disk surrounding them indicates instability in the disk. Image credit: Bill Saxton / ALMA / ESO / NAOJ / NRAO / AUI / NSF. The stellar system...
