With access to more than 400 satellites plus at least two tiny, maneuverable robotic shuttles, the U.S. military is the clear leader in military spacecraft. But with 70 orbiters of its own, China is catching up fast. Last year, Beijing matched Washington in space launches for the first time, boosting no fewer than 15 satellites into orbit. It was the first time any nation kept a celestial pace with the U.S. since the height of the Cold War.

The new space race is on. But in the view of one influential analyst, the race isn’t worth the prize. Space “is expensive to enter, hard to sustain assets i...

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Still got tablet fever? Somebody must, because they just keep coming.

Sony unveiled the final versions of its two new Android tablets Wednesday. These are the same two devices we saw last month — the curvy, wedge-shaped full-sized tablet is now called the Sony Tablet S, and the dual-screen tablet that folds up into a pocket-sized burrito is now called the Sony T...