Add Yahoo as a preferred source to see more of our stories on Google. On Aug. 25, 1997, NASA launched the Advanced Composition Explorer, or ACE satellite to study energetic particles travelling ...

NASA's Advanced Composition Explorer (ACE) observes a wide array of particles that flow toward Earth from the sun to better understand the great space weather system that connects the sun to our ...

A multinational team of researchers studying data from NASA’s Advanced Composition Explorer (ACE) satellite believe they have identified two major warnings signs that together trigger destructive ...

NASA: Planning a trip to Mars? Take plenty of shielding. According to sensors on NASA’s ACE (Advanced Composition Explorer) spacecraft, galactic cosmic rays have just hit a Space Age high. NASA: ...