ASTROPHYSICS:
Stellar Pair Whirls in a 5-Minute Dash
Robert Irion
European astronomers have identified what they believe is the tightest pair of stars yet seen: two white dwarfs that dash around each other every 5 minutes. If confirmed, the whirling dervishes are revolving twice as fast as the previous closest pair. Moreover, say astronomers, the binary is one of the most promising targets for detection of gravitational waves: eerie ripples in space-time that a future orbiting observatory will chase.