Astronomy
Angular Momentum Transport Mechanisms in Protoplanetary Disks
Quick fact
In a protoplanetary disk, material must lose angular momentum to fall inward toward the star, and turbulent mixing or magnetic winds are believed to be the primary vehicles for this transport—without them, planets would never form.
Why this is interesting
You've seen pictures of dusty rings around young stars, but have you ever wondered how those disks manage to feed material to a growing planet? The answer lies in a cosmic dance of angular momentum.