Apps similar to Celestia include Stellarium, which is free and open source. Other options are Space Engine, Noctua Stellarium, Solar System Scope and Gaia Sky. Star Maps like Celestia are a crowded field, with more than 25 alternatives for Windows, Linux, Mac, Android and iPad.
In this app you can explore almost any moon or planet of our solar system and visit remarkable nearby stars and see their location in the Milky Way. But you can also change existing bodies or add new ones and make a solar system of your own.
Experience the captivating wonders of the cosmos with Galaxy Map - Stars and Planets, an interactive 3D planetarium powered by precise data obtained from NASA and ESA space missions. Delve into a profound expedition through the infinite expanse of space, where an abundance of...
Aciqra (uh-SEE-kruh) is a free and open source virtual sky map and planetarium which tracks and displays astronomical bodies including planets, nebulae and stars to an accuracy of a fraction of a degree for thousands of years into both the future and the past.
StarCalc is the fastest professional astronomy planetarium & star mapping program for Windows 9x/ME/NT/2000/XP (StarCalc version for PocketPC is available). It illustrates star positions of any instance of the day observed from any geographic locations on the Earth.
Russia
Visit distant exoplanets on a thrilling journey through our galaxy! Exoplanet Explorer presents interactive 3D models of real solar systems and visualises planets that have been discovered around distant stars.
SourceForge presents the Solar Model project. Solar Model is an open source application. SourceForge provides the world's largest selection of Open Source Software. The Solar Model is real time modeling of solar system.
United States
The Sun's and Earth's rotation axes are both tilted with respect to the ecliptic, the plane of the Earth's orbit around the Sun.
