Astronomical Stellarium Software
Download a free Planetarium. Once you have set your co-ordinates Stellarium will show you where the Planets, Galaxy's and Nebula are in the sky? So what you see on the screen is what you see outside.
Two screen-shots of Stellarium in action are shown below:
Please note the image to the right is actually the Hampshire Astronomical Group observatory. It is made available to all members, and can be downloaded from Members Downloads within the Members Area.