  Astrophysics and cosmology can be used to test the standard model of particle
physics under conditions and over distance and time scales not accessible to
laboratory experiments. Most of the astrophysical observations are in good
agreement with the standard model. In particular, primordial nucleosynthesis,
supernova explosions, stellar evolution and cosmic background radiations have
been used to derive strong limits on physics beyond the standard model.
However, the solution of some important astrophysical and cosmological problems
may require new physics beyond the standard model. These include the origin of
the initial conditions, large scale structure formation, the baryon asymmetry
in the observed Universe, the dark matter problem, the solar neutrino problem
and some cosmic ray puzzles. Here I review some important developments relevant
to some of these problems, which took place most recently.
