About This Book
From Hipparchus and Ptolemy in the ancient world, through Copernicus and Brahe in the sixteenth century, astronomers had used geometrical models to give a kinematic account of the movements of the sun, moon, and planets. Johannes Kepler revolutionized this most ancient of sciences by being the first...
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Reading Time Estimates
5h 54m
slow reader
180 WPM
4h 15m
average reader
250 WPM
3h 2m
fast reader
350 WPM
π 63,800 wordsπ
9 days at 30 min/day
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WPM
Reading time
4 h 15 min
at 250 words per minute
Audiobook (1.5x)
4 h 44 min
at 1.5x narration speed
Audio 1x
7 h 5 min
Audio 2x
3 h 33 min
That's about:
- π 9 daysΒ reading 30 min/day
- π9 commutesΒ of 30 min each