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Ariane 5 launches two satellites on 7-year voyage to Mercury
A powerful European Ariane 5 rocket blasted off from French Guiana late Friday and boosted a pair of satellites into space for a seven-year plunge into the inner solar system, a voyage requiring seven planetary flybys to slow down enough in the sun's gravitational clutches to slip into orbit around hellish Mercury.
James Webb Space Telescope completes critical end-to-end test
NASA's $8.8 billion James Webb Space Telescope has completed critical end-to-end testing in a giant vacuum chamber at the Johnson Space Center, proving the telescope will work properly in the deep cold of space, bring starlight to a sharp focus and precisely track its astronomical targets when launched in 2019.