astronomers

I'm looking for a type of software which would allow me to map out and calculate relative differences between stars and constellations. Sorta like a Google Earth with a star chart instead of satellite pictures of the earth. I found something called Sky Charts but it's not quite what I need...

A person has recently challenged my assertion that the universe, according to conventional wisdom, is ~14.5 billion years old. Could someone please tell me I'm not crazy, and that my memory is still working? H.