Astronomy is the scientific study of celestial objects (such as stars, planets, comets, and galaxies) and phenomena that originate outside the Earth's atmosphere (such as the cosmic background radiation). It is concerned with the evolution, physics, chemistry, meteorology, and motion of celestial objects, as well as the formation and development of the universe.
In astronomy, there is a wide variety of software. In most cases, there are many different versions of software that do a particular thing.
A real-time space simulation that lets you experience our universe in three dimensions
SkyORB is a 3D planetarium,star gazing and epheremis, based from V3X.net engine.
Stellarium is planetarium software that shows exactly what you see when you look up at the stars. It's easy to use, and free.
4. Google Earth
Google Earth lets you fly anywhere on Earth to view satellite imagery, maps, terrain, 3D buildings, from galaxies in outer space to the canyons of the ocean. You can explore rich geographical content, save your toured places, and share with others.
5. Asynx Planetarium
Asynx Planetarium is a easy to use planetarium program and solar system simulator. It can display the night sky from any location on earth and between the year 1760 and 9999. Perfect for students, kids and astronomy beginners.