'22 
SURVIVAL ON LAND AND SEA 
Strait, or around the northern Galapagos Islands on those dates 
the sun would pass directly overhead. 
Stars 
The stars also move across the sky from east to west. Their 
position relative to one another remains fixed. This is a con- 
venience in locating them, once you learn the relationship of 
stars and groups of stars to one another. Upon locating one or 
more stars or constellations in the sky you can use them as 
markers or landmarks, telling you where to look for others 
whose direction from the first you know. 
You won’t find the same stars in the same part of the heavens 
every night. This is because the sun, which is responsible for 
our days and nights, moves westward around the earth at a 
slightly greater speed than do the stars. 
Consequently stars which may be just appearing over the 
horizon at midnight, one month, may be high in the heavens at 
midnight another month. Or they may not appear at all. The 
latter happens when they travel across the sky within a few 
hours of the sun, which, of course, would be during daylight. 
For the stars travel across the sky in daylight just as they do at 
night. During the day the sky is so light that the stars cannot 
be seen. 
Planets 
Planets such as Mars, Jupiter, and Yenus closely resemble 
stars — except that they do not twinkle as do stars, or change 
their apparent brightness. Planets are known as wanderers, 
since they move about among the stars. Because of their vagrant 
habits they are not much help to the survivor in determining 
