Skip to main content

Gravity’s Engines – Caleb Scharf *****

Black holes are the rock stars of cosmology. With the possible exception of the Big Bang, nothing gets better press. And there has been plenty written about the guts of black holes – but in Gravity’s Engines, Caleb Scharf turns the picture on its head and explores the interaction of black holes with the environment around them.
The result is stunning. I can’t remember when I last read a popular science book where I learned as much I hadn’t come across before. In particular Scharf’s descriptions of the super-massive black holes in the centres of galaxies and how they influence the formation and structure of the galaxies is truly fascinating.
What’s more, this is no workmanlike bit of dull scientist droning, like some books by astronomers. Scharf can wax lyrical when taking us on a journey through space. I particularly loved the cosmic zoom fairly early on in the book, where he follows X-ray photons from a distant galaxy 12 billion light years away, very cleverly linking their flight to events on Earth (once it had formed around 4.5 billion years ago) that were happening at the same time.
The book is not without problems. Often the description is great, but sometimes it tips over into the flowery. It’s difficult not to lose interest a bit when Scharf goes into the details of his own work in a lengthy section. The attempt to show that black holes are somehow responsible for life on Earth stretches the credulity. And worst of all, Scharf never admits how much of what’s in the book is speculative, stating almost all of it as if it were unquestioned fact. So, for instance, dark matter is taken for granted with nary a mention of the competing MOND theory. I don’t think scientists (especially cosmologists) do themselves any favours when they pretend they deal in absolute facts.
This doesn’t detract though from the reality that this is the best cosmology book I’ve read all year, and a must for anyone with an interest in black holes. Recommended.
Hardback:  
Kindle:  
Review by Brian Clegg

Comments

Popular posts from this blog

The Dialogues - Clifford Johnson ***

The authors of science books are always trying to find new ways to get the message across to their audiences. In Dialogues, Clifford Johnson combines a very modern technique - the graphic novel or comic strip - with an approach that goes back to Ancient Greece - using a dialogue to add life to what might seem a dry message.

We have seen the comic strip approach trying to put across quite detailed science before in Mysteries of the Quantum Universe. As with that book, Dialogues manages to cover a fair amount of actual physics, but I still feel that the medium just wastes vast acres of page to say very little at all. This is brought home here because quite a lot of the sections of Dialogues start with several pages with no text on at all, just setting up the scenario.

As for using a discussion between two people to put a message across, Johnson makes the point that, for instance, Galileo's very readable masterpiece Two New Sciences is in the form of a dialogue (more accurately a discu…

Liam Drew - Four Way Interview

Liam Drew is a writer and former neurobiologist. he has a PhD in sensory biology from University College, London and spent 12 years researching schizophrenia, pain and the birth of new neurons in the adult mammalian brain. His writing has appeared in Nature, New Scientist, Slate and the Guardian. He lives in Kent with his wife and two daughters. His new book is I, Mammal.

Why science?

As hackneyed as it is to say, I think I owe my fascination with science to a great teacher – in my case, Ian West, my A-level biology teacher.  Before sixth form, I had a real passion for the elegance and logic of maths, from which a basic competence at science at school arose.  But I feel like I mainly enjoyed school science in the way a schoolkid enjoys being good at stuff, rather than it being a passion.

Ian was a revelation to me.  He was a stern and divisive character, but I loved the way he taught.  He began every lesson by providing us with a series of observations and fact, then, gradually, between …

A Galaxy of Her Own - Libby Jackson ****

This is an interesting book, even if it probably tries to be too many things to too many people. I wondered from the cover design whether it was a children's book, but the publisher's website (and the back of the book) resolutely refuse to categorise it as such. The back copy doesn't help by saying that it will 'inspire trailblazers and pioneers of all ages.' As I belong to the set 'all ages' I thought I'd give it a go.

Inside are featured the 'stories of fifty inspirational women who have been fundamental to the story of humans in space.' So, in some ways, A Galaxy of Her Own presents the other side of the coin to Angela Saini's excellent Inferior. But, inevitably, given the format, it can hardly provide the same level of discourse.

Despite that 'all ages' comment and the lack of children's book labelling we get a bit of a hint when we get to a bookplate page in the form of a Galaxy Pioneers security pass (with the rather worrying…