Stellarium is an astronomy software totally free , which lets you view the sky as we would see with the naked eye, binoculars or a telescope, similar to a planetarium. With excellent quality technical and graphics, this program simulates the daylight sky, night and twilight, moving closer to reality in a surprising way.
The application shows more than 120,000 stars, constellations, planets, nebulae, sun and moon, with detailed information, based on the catalog project Hipparcos . Allows you to render images with photographic quality of the sky in three dimensions, as well as landscapes of soil and atmospheric effects.
Using the geographical coordinates of a location (latitude and longitude), the program shows the sky at a given date and time (day or night) at any angle and with different degrees of approximation (zoom).
With this simulator can also observe eclipses of the sun and moon, giving the date and time of the phenomenon, along with the geographical coordinates of a location where the eclipse can be observed. The possibility of fish-eye projection 180-degree dome makes this software is used in many planetariums.
Apart from being totally free , this software is available for multiple platforms: Windows, Mac OS X and GNU / Linux.
Website:
http://www.stellarium.org/pt/
