Stellarium key features:
default catalogue of over 600,000 stars extra catalogues with more than 210 million stars asterisms and illustrations of the constellations constellations for twelve different cultures images of nebulae (full Messier catalogue) realistic Milky Way very realistic atmosphere, sunrise and sunset the planets and their satellites
a powerful zoom time control multilingual interface fisheye projection for planetarium domes spheric mirror projection for your own low-cost dome all new graphical interface and extensive keyboard control telescope control
equatorial and azimuthal grids star twinkling shooting stars eclipse simulation skinnable landscapes, now with spheric panorama projection
plugin system adding artifical satellites, ocular simulation, telescope configuration and more ability to add new solar system objects from online resources... add your own deep sky objects, landscapes, constellation images, scripts...