@eufisica Thank you very much for RT. I share this from Universe Today http://t.co/gf1uP1H – ChiliDog Observatory (CCantuQ) http://twitter.com/CCantuQ/status/95262242865561600
Interactive 3D model of Solar System, Planets and Night Sky: "Welcome to Solar System Scope space traveller, SSS means Astronomy for Everybody. Whether you are a student, astronomy fan or an accidental browser, you are most welcome to play with our user-friendly application. It's full of space-art graphics, has easy-to-use interface with various settings and offers interesting information. SSS will illustrate you real-time celestial positions with planets and constellations moving over the night sky. But I can see you're not just a passive spectator - and that's good, because you can actively change parameters for a better understanding of happenings in our Solar System and the Universe." in www.solarsystemscope.com
Physical sun light This will model sun lighting from NASA measurements, including atmospheric absorption adjustable through the turbidity parameter. The size of the sun can be tweak from its reference size with the relsize (relative size) parameter. To get a correct effect, the Z axis must point above, the Y axis is north and X axis is east. Physical sky light The physical sky creates a lighting setup that simulates the light of the sun and atmosphere, based on the direction of a sun lamp in the scene and a parameter named turbidity which defines the clearness of the sky. Both the sun angle and the sky clearness influence the colour of the light. Additional parameters called aconst, bconst, cconst, dconst, econst allow you to fine tune the color of the sky to simulate various atmospheric conditions.