Later, as the months wear on, a series of additional messages arrive from Gerry -- always delivered in the most remarkable and surprising of ways. With each new message comes a new adventure, and each letter signs off in the same familiar way: P.S. I love you..
For a person standing at sea level, however, the horizon is only about 3 miles away. Lets do the calculations. The figure below shows an observer whose eyes are a distance E above sea level. A straight line drawn from the observers eyes tangent to the seas surface touches it at the distance d1, which is the distance to the horizon. If R is the radius of the earth, then, to first order in E/R, it is easy to show that.
The horizon or skyline is the apparent line that separates earth from sky, the line that divides all visible directions into two categories: those that intersect the Earth's surface, and those that do not.hen looking at a sea from a shore, the part of the sea closest to the horizon is called the offing. The word horizon derives from the Greek á½ÏÎ¯Î¶ÏÎ½ ÎºÏÎºÎ»Î¿Ï horizÅn kyklos, separating circle, from the verb á½ÏÎ¯Î¶Ï horizÅ, to divide, to separate, and that from á½ÏÎ¿Ï (oros), boundary, landmark.