Icon Books Dark Matter and Dark Energy: The Hidden 95% of the Universe

Another great book from Brian Clegg at a great price.

Well written and the subject matter was explained very well

I am sorry, I don't want to be rude to someone's time and effort, however, this book was a total waste of time. The content was not more than just a collection of Wikipedia info written in a very disorganized fashion. Books with such kind of content should be written by the experts of the fields, rather than journalists.

This is a very nicely written book on a very complex subject whose existence is still a subject of research. The language is simple and easy to understand. It has ample figures. I recommend.

This is a short, fascinating, and very readable account of two of the major puzzles in science. The first puzzle the book delves into is dark matter. Data on the rotation of galaxies indicates that either there's a lot of matter that we haven't spotted (dark matter), or that our theory of gravitation needs modification, or that there are errors in our modeling of galactic motion. The latter two possibilities were new to me and are clearly described. Indeed, I found this book among the clearest science books I've read. For instance, in chapter three Clegg very briefly but lucidly explains why the universe became transparent around 13.5 billion years ago. I can't remember where I first read about this, but I can remember that my initial introduction to it was distinctly befuddling (one might say opaque).The second puzzle the book tackles is dark energy, a term which, in chapter five, Clegg says "tells us no more than calling it 'fluffy bunnikins'." In any event, dark energy is the term given to whatever it is that causes the accelerating expansion of the universe. While astronomers are in general agreement that this accelerating expansion is real, there is no consensus about what causes it.If you have any interest in astronomy or in current open questions in science, I highly recommend this book.About my reviews: I try to review every book I read, including those that I don't end up enjoying. The reviews are not scholarly, but just indicate my reaction as a reader, reading being my addiction. I am miserly with 5-star reviews; 4 stars means I liked a book very much; 3 stars means I liked it; 2 stars means I didn't like it (though often the 2-star books are very popular with other readers and/or are by authors whose other work I've loved).