The Sky People The Sky People The Sky People is an alternate history science fiction novel by American writer S. M. Stirling. It was first published by Tor Books in hardcover in November 2006, with a book club edition co-published with the Science Fiction Book Club following in December of the same year. Tor issued paperback, ebook and trade paperback editions in October 2007, April 2010 and May 2010, respectively. Audiobook editions were published by Tantor Media in January 2007. The book takes place on the planet Venus in an alternate solar system where probes from the United States of America and the
Sunrise is 34 arcminutes, though this amount varies based on atmospheric conditions. Also, unlike most other solar measurements, sunrise occurs when the Sun's "upper limb", rather than its center, appears to cross the horizon. The apparent radius of the Sun at the horizon is 16 arcminutes. These two angles combine to define sunrise to occur when the Sun's center is 50 arcminutes below the horizon, or 90.83° from the zenith. The timing of sunrise varies throughout the year and is also affected by the viewer's longitude and latitude, altitude, and time zone. These changes are driven by the axial tilt of