The fifty ideas in this book are very interesting to enthusiasts of astronomy and physics and are presented in a good and explained without a drop of maths.
This book is divided in three parts. The first part handles general concepts, the second the basis of astronomy and the third shows a few specific concepts of astronomy, although those parts are mingled.
The first part, as I already wrote, is about general concepts of physics, mainly, but slightly oriented to astronomy. Doppler effect, Fraunhofer lines and dark matter are just a few of them.
Kepler's laws, the cosmic inflation and others compose the second part, the basis of astronomy.
The third part has the most interesting ideas of the book. The stuff like quasars, pulsars or supermassive black holes makes us think how small we are. Just imagine a black hole the size of the solar system.
Then, there are some ideas which don't fit anywhere, like the string theory, but are just as interesting.
Have in notion that this isn't the index of the book, but I think that is better organized.
Everyone should read and enjoy it.
Till next time,
M.I.T.H. (ManInsideTheHelm)