More than a decade has passed since pulsars were discovered at Cambridge
by J. Bell and A. Hewish. The past 13 years have seen ex- tensive and at
first rather hectic research, and a considerable amount of observational
and theoretical knowledge has been accumulated. Looking back over one
decade of pulsar research, it seems worth- while to ask what the real
impact of the detection was and if our view of the universe has changed
as a result of this discovery. The excite- ment of the first months and
years has ebbed down considerably, with the result that pulsar research
has become the task of a few scientists, working in small groups,
scattered over many countries. As more and more knowledge was acquired,
pulsars changed eventually from the bizarre pUlsing objects -- as they
were considered in the beginning -- to more normal stars of
astrophysical interest. Still, pulsars are the manifestation of matter
in its most extreme form -- neutron star matter -- for which an
equivalent can be found on earth only in the very nucleus of an atom.
Neutron stars were predicted quite early in the history of modern
astrophysics, and although many of their features were already known
from theoretical studies, astro- physicists were not sure if we had the
slightest chance to actually "see" these objects. It therefore took some
time after the historical detection paper of Hewish and coworkers before
astronomers became con- vinced that pulsars were neutron stars.