Anyone knows if this book is good? Amazon is selling at US$80.62 but S&T is having a Christmas sale at US$65.
Cheers!
Allen's Astrophysical Quantities
Allen's Astrophysical Quantities
[80% Steve, 20% Alfred] ------- Probability of Clear Skies = (Age of newest equipment in days) / [(Number of observers) * (Total Aperture of all telescopes present in mm)]