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O3b Networks' first four satellites arrive for the next Arianespace Soyuz launch
The initial four O3b spacecraft to be launched by Arianespace on Soyuz have arrived in French Guiana, taking the global satellite operator one step closer to its goal of deploying a next-generation ... more
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Virgin Galactic tourist spaceship breaks sound barrier
Virgin Galactic's passenger spaceplane, which is designed to take tourists to the edge of space, flew its first rocket-powered test flight Monday, breaking the sound barrier at high altitude. ... more
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Bizarre binary star system pushes study of relativity to new limits
An international team of astronomers and an exotic pair of binary stars have proved that Albert Einstein's theory of relativity is still right, even in the most extreme conditions tested yet. The re ... more
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Astronomer studies far-off worlds through 'characterization by proxy'
A University of Washington astronomer is using Earth's interstellar neighbors to learn the nature of certain stars too far away to be directly measured or observed, and the planets they may host. ... more
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