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ALMA Detects Hallmark “Wiggle” of Gravitational Instability in Planet-Forming Disk
ding to Nebula Theory, stars and their systems of planets form when a massive cloud of gas and dust (a nebula) undergoes gravitational collapse at the center, forming a new star. The remaining material from the nebula then forms a disk around the star from which planets, moons, and other bodies will eventually accrete (a protoplanetary disk).
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