NASA's Constellation program, which is a collection of
technologies intended to replace the US Space Shuttle as America's
primary way into space, is up against a number of serious technical
challenges. The Ares I rocket, in particular, has acknowledged
problems with adequate lift capability and vibration.
New observations from NASA's Spitzer Space Telescope indicate
that the nearest planetary system to our own has two asteroid
belts. Our own solar system has just one.
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