XMM-Newton reveals a tumbling neutron star
Using data from ESA's XMM-Newton X-ray observatory, an international group of
astrophysicists discovered that one spinning neutron star doesn’t appear to be
the stable rotator scientists would expect. These X-ray observations promise to
give new insights into the thermal evolution and finally the interior structure
of neutron stars.
Full story:
http://www.esa.int/esaSC/SEMSIWNFGLE_index_0.html