Scientific expectations and first results from the James Webb Space Telescope.

The recently launched James Webb Space Telescope (JWST) is the most advanced and sensitive IR telescope ever built. With its $6.5 {m}$ cooled mirror and state-of-the-art instrumentation, it will reach limiting fluxes, spatial and spectral resolutions from 100 to 1000 better than any previous telescope. In my contribution I will review the primary features of the satellite and the planned science goal. I will also report the very first discoveries obtained with the telescope, as scientific observations are supposed to start on July 1, 2022.