It takes the average reader 5 hours and 30 minutes to read Celestial Messengers by Mario Bertolotti
Assuming a reading speed of 250 words per minute. Learn more
The book describes from a historical point of view how cosmic rays were discovered. The book describes the research in cosmic rays. The main focus is on how the knowledge was gained, describing the main experiments and the conclusions drawn. Biographical sketches of main researchers are provided. Cosmic rays have an official date of discovery which is linked to the famous balloon flights of the Austrian physicist Hess in 1912. The year 2012 can therefore be considered the centenary of the discovery.
Celestial Messengers by Mario Bertolotti is 330 pages long, and a total of 82,500 words.
This makes it 111% the length of the average book. It also has 101% more words than the average book.
The average oral reading speed is 183 words per minute. This means it takes 7 hours and 30 minutes to read Celestial Messengers aloud.
Celestial Messengers is suitable for students ages 12 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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