Galaxy formation not random, says astronomer . Asteroid or comet triggered death of most species 250 million years ago . Into space on thin air . Measurement of stellar age from uranium decay . ISO detects benzene in space .
Cassini camera visualizes the invisible during Jupiter flyby .
Aircraft damage detected by heat and sound . Chandra associates pulsar and historic supernova . Computer Monitoring System For Testing Gearbox Components to Destruction . Astronomers land major satellite observing program . Could Offer Clues To Subatomic Particles .