It takes the average reader 3 hours to read Dark Matter and Dark Energy by Brian Clegg
Assuming a reading speed of 250 words per minute. Learn more
All the matter and light we can see in the universe makes up a trivial 5 per cent of everything. The rest is hidden. This could be the biggest puzzle that science has ever faced. Since the 1970s, astronomers have been aware that galaxies have far too little matter in them to account for the way they spin around: they should fly apart, but something concealed holds them together. That ’something' is dark matter – invisible material in five times the quantity of the familiar stuff of stars and planets. By the 1990s we also knew that the expansion of the universe was accelerating. Something,...
Dark Matter and Dark Energy by Brian Clegg is 176 pages long, and a total of 45,056 words.
This makes it 59% the length of the average book. It also has 55% more words than the average book.
The average oral reading speed is 183 words per minute. This means it takes 4 hours and 6 minutes to read Dark Matter and Dark Energy aloud.
Dark Matter and Dark Energy is suitable for students ages 10 and up.
Note that there may be other factors that effect this rating besides length that are not factored in on this page. This may include things like complex language or sensitive topics not suitable for students of certain ages.
When deciding what to show young students always use your best judgement and consult a professional.
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