Astronomers using the United Kingdom Infrared Telescope (UKIRT) in Hawaii discovered the four star pairs, each of which is a binary system in which two stars circle each other in less than four hours.

MSN: 'Impossible' stars found in our galaxy - Technology & science - Space - Space.com | NBC News

With four pods arranged in a circle, the Harmony node becomes one of the station's safe havens.

BBC: A space of one's own

Four buttons arrayed in a circle bring up the command menu, play and pause songs, and shift forward and back.

FORBES: IPod's A Winner

Borel is the only jockey to win the Derby three times in a four-year span, standing in the winner's circle in 2007 with Street Sense, 2009 with Mine That Bird and 2010 with Super Saver.

WSJ: Jockeys Antley, Borel lead racing hall finalists

The idea is to circle the globe in five stages, each taking four or five days of continuous flight (which is about as much as a pilot could endure).

ECONOMIST: Electric planes

The Penguins, with nothing to play for other than an outside chance of catching the Blackhawks for the league's best record, appeared ready to end a three-game in four-day stretch until Kris Letang found Iginla standing by himself at the top of the left circle.

WSJ: Vanek powers Sabres by Penguins 4-2