Live coverage: Veteran three-man crew docks with space station

Working around the clock to meet a 12-day launch window in March, European engineers are putting the final touches on a Mars orbiter that could shed light on whether tiny microbes or geologic activity still linger on the barren planet.

A Russian rocket released two Galileo navigation satellites nearly 15,000 miles above Earth early Friday, adding to a growing fleet giving Europe an independent space-based positioning system tracking automobiles, airplanes and cell phone-carrying people around the world.

Japan’s third navigation satellite rode an H-2A rocket into orbit Saturday from the Tanegashima Space Center in southern Japan, one week after officials aborted a countdown to resolve a helium leak in the vehicle’s first stage. Liftoff occurred at 0529 GMT (1:29 a.m. EDT) Saturday.