SEATTLE--Astronomers studying bursts of x-rays from spinning neutron stars may have seen one of these superdense objects brake and accelerate like a
bullet.

The discovery, reported in the journal Nature, could help astronomers understand how neutron stars are born and how they evolve.

"This is the first time we've seen a neutron star accelerate and decelerate," said study co-author Michael Kramer, a researcher at the Max Planck Institute