About This Book
The Ever-Changing Sky provides a comprehensive and non-mathematical guide to spherical astronomy. The reader is guided through terrestrial and celestial co-ordinate systems, time measurement and celestial navigation, to the prediction of the rising and setting of the stars, Sun and Moon. It focuses...
More by James B. Kaler
Featured in Lists
Reading Time Estimates
13h 21m
slow reader
180 WPM
9h 36m
average reader
250 WPM
6h 52m
fast reader
350 WPM
π 144,100 wordsπ
20 days at 30 min/day
How Long Will It Take You?
β‘
Get your personal reading time for "The Ever-Changing Sky"
Take a 60-second speed test β we'll calculate how long this book will take you
WPM
Reading time
9 h 36 min
at 250 words per minute
Audiobook (1.5x)
10 h 40 min
at 1.5x narration speed
Audio 1x
16 h 1 min
Audio 2x
8 h
That's about:
- π 20 daysΒ reading 30 min/day
- π20 commutesΒ of 30 min each