  A novel low-energy neutrino-oscillation experiment NOSTOS, combining a strong
tritium source and a high pressure spherical TPC detector (10 m in radius) has
been recently proposed. The goal of the experiment is to measure the mixing
angle $\theta_{13}$, the neutrino magnetic moment and the Weinberg angle at low
energy. The same apparatus, filled with high pressure Xenon, exhibits a high
sensitivity as a Super Nova neutrino detector with extra galactic sensitivity.
Results of a first prototype will be shown and a short-term experimental
program will be discussed.
