Look at the night sky from your hole or anywhere - for free!.
I attend an Astronomy group/class and we often use Stellarium. It allows you to look at the nightsky from anywhere on earth, or even away from the earth (for example from the moon), and at any time in the past or future. It's difficult to fault and it's free!
Pros: The ability to move time forwards or back and to move from one location to another.
I haven't so far found it wanting in any any use. More