The book was written in a time when there was a lot less light pollution in the sky, and I'm not sure that a stargazer today would be able to see quite as much. But there is plenty of information in the book to help you spot lots of different planets, stars and constellations.
I've challenged myself to identify some more constellations, and this book is going to be a big help as the only constellation that I can currently reliably find is Orion.
The Night Sky is packed with fascinating information. I'll definitely be re-reading it myself, as well as sharing it with the children as they start to take an interest in the skies.