Some great software below that allows you to get a view of the skies, in real time, charting the constellations, nebulae and so on.
Stellarium is an open source desktop planetarium for Linux/Unix, Windows and MacOSX. It renders the skies in realtime using OpenGL, which means the skies will look exactly like what you see with your eyes, binoculars, or a small telescope. Stellarium is very simple to use, which is one of its biggest advantages: it can easily be used by beginners.
I tried this one and was amazed. It renders nicely, is a very small download at about 10MB, and shows you a view of the stars from practically anywhere on the planet. As long as you have a latitude and longitude of your location, you can use it to view the stars from you exact location.
Also I was pulling down 158FPS using an average system.
Find your lat and long:
For the US:
ANOTHER ASTRONOMY SOFTWARE PACKAGE:
Welcome to Celestia
... The free space simulation that lets you explore our universe in three dimensions. Celestia runs on Windows, Linux, and Mac OS X.
Unlike most planetarium software, Celestia doesn't confine you to the surface of the Earth. You can travel throughout the solar system, to any of over 100,000 stars, or even beyond the galaxy.
All movement in Celestia is seamless; the exponential zoom feature lets you explore space across a huge range of scales, from galaxy clusters down to spacecraft only a few meters across. A 'point-and-goto' interface makes it simple to navigate through the universe to the object you want to visit.
Celestia is expandable. Celestia comes with a large catalog of stars, planets, moons, asteroids, comets, and spacecraft. If that's not enough, you can download dozens of easy to install add-ons with more objects.