Screaming Penguin - Source Does Matter

Scientists have recently been able to measure the ratio of mass and radius in the extreme gravity of a Neutron star. This was accomplished with the help of an X-ray satellite telescope and 28 explosions on a neutron star in part of a binary star system named EXO 0748-676, located in the constellation Volans.

Neutron stars are so dense that all space is squeezed out of atoms and "protons and electrons squeeze into neutrons, leaving a neutron superfluid, a liquid that flows without friction". Huh, huh, cool.

For more science stuff check the linked ScienceDaily story and for the record the entire site is great.