Engineers developing the heavy-lift SLS are polling the worldwide launch industry in search of an upper stage.

The past year has seen a lot of turbulence in the stock market, but there have been a few bright spots for investors in aerospace and defense companies. Shares in suppliers of aerospace components fared particularly well in 2011 as Airbus and Boeing ramped up output, and soaring order numbers added to the airframers' already bulging backlogs. Notable performers among suppliers include Hexcel (up 34%), TransDigm Group (33%), Triumph Group (31%), Sifco Industries (23%), Rolls-Royce (20%), Precision Castparts (18%), Safran (12%) and Moog (10%).

ESA would use existing facilities and skills to build service-module structure and systems for the U.S. spacecraft.

NASA's twin Gravity Recovery And Interior Laboratory (Grail) spacecraft straddled the New Year as they eased into orbit around the Moon, where they will provide the most detailed gravity maps available and important clues to the origins of Earth's big satellite. Before the mission is over, the two spacecraft will also give thousands of middle-school students some hands-on experience in space research. After spending 3.5 months on a low-energy trajectory that started with a tandem launch Sept. 10, 2011, the first of the Grail orbiters braked into lunar orbit at 5 p.m.

NASA's Orion could launch in 2014 and one day carry astronauts to an asteroid or Deimos.

Launch of France's first Pleiades Earth-imaging satellite plus a quartet of French military radar-mapping microsatellites atop the second Russian Soyuz flying from the European spaceport near Kourou, French Guiana, suggests that some cross-fertilization may be in order for the troubled Russian space program. The Dec. 16 mission marked the second flight of the Europeanized rocket from the new Soyuz pad at Sinnamary (see photo).