It's the latest in a series of mysterious radio signals that may point to new types of dead stars. Astronomers are looking for more of these signals — and hoping ones they've discovered will reappear.

Astronomers have identified a vast, twisting chain of galaxies that appears to be rotating as a single structure, a kind of cosmic tornado that stretches across tens of millions of light years. If ...

To demonstrate the system, the researchers showed that it could reconstruct real-time high-quality still images of a model jet engine rotating at about ∼2170 rpm (top images) and a CPU cooling fan ...