To better understand angular momentum loss, Bellan studied the trajectories of individual atoms, ions and gas in an accretion disk and, in turn, how particles behave during and after collisions.

determine the angular momentum carried away by the gravitational waves emitted during a black hole collision. “This is a wonderful paper and a wonderful result,” said Marcus Khuri, a mathematician at ...

Conservation of angular momentum explains why an ice skater spins ... These differences are believed to stem from collisions that occurred late in the planets' formation. (A similar collision ...

Conservation of angular momentum means that this cloud spins ... might have lost their spin due to chance interactions and collisions with other objects. Planets originate as dust particles ...

collisions between particles cancel out their random motions and they converge, forming a spinning, flat disk. From this tug-of-war between gravity and angular momentum, the gas and dust in a ...

This expansion is most noticeable on the largest cosmic scales. Angular momentum is crucial to cosmic rotation. When two objects in space come close together, their mutual gravity pulls them ...

Lock and Stewart are particularly interested in collisions between spinning objects. A rotating object has angular momentum, which must be conserved in a collision. Think of a skater spinning on ice: ...