Inner Space-Outer Space: Particle Physics & ------------------------------------------- Cosmology at the Interface -------------------------- Speaker: Professor Sidney Bludman (University of Pennsylvania & Desy) Abstract: ========= After reviewing the remarkable synthesis now taking place between theoretical particle physics and astrophysics/cosmology, I will report on the significance of recent determinations of neutrino masses and of the cosmological constant. I will review my own research in neutrino astrophysics, confirming other determinations of the cosmological matter density and the cosmological constant.