Astronomers using the National Science Foundation's Green Bank Telescope (GBT) have discovered the most massive neutron star yet found, a discovery with strong and wide-ranging impacts across several fields of physics and astrophysics. In this image: Pulses from the neutron star (rear) are slowed as they pass near foreground white dwarf.This effect allowed astronomers to measure masses of the system. more info

See the website for more details. http://www.nrao.edu/pr/2010/bigns/（SY）