When observed from very high standpoints, such as a space station, the horizon is much farther away and it encompasses a much larger area of Earth's surface. For instance, in standard atmospheric conditions, for an observer with eye level above sea level by 1.70 metres (5 ft 7 in), the horizon is at a distance of about 5 kilometres (3.1 mi).
![horizon modding tool explanation horizon modding tool explanation](https://venturebeat.com/wp-content/uploads/2018/06/Screen-Shot-2018-06-21-at-5.04.51-PM.jpg)
Also, the higher the observer's eyes are from sea level, the farther away the horizon is from the observer. Its distance from the observer varies from day to day due to atmospheric refraction, which is greatly affected by weather conditions. With respect to Earth, the center of the true horizon is below the observer and below sea level. The true horizon surrounds the observer and it is typically assumed to be a circle, drawn on the surface of a perfectly spherical model of the relevant celestial body. On Earth, when looking at a sea from a shore, the part of the sea closest to the horizon is called the offing. The resulting intersection of such obstructions with the sky is called the visible horizon. At many locations, this line is obscured by terrain, and on Earth it can also be obscured by life forms such as trees and/or human constructs such as buildings. The true horizon is a theoretical line, which can only be observed to any degree of accuracy when it lies along a relatively smooth surface such as that of Earth's oceans.
![horizon modding tool explanation horizon modding tool explanation](https://petrofilm.com/yahoo_site_admin/assets/images/b-1b_lancer_b.4350933_std.jpg)
This line divides all viewing directions based on whether it intersects the relevant body's surface or not.
![horizon modding tool explanation horizon modding tool explanation](https://images-na.ssl-images-amazon.com/images/I/41mfp3QzltL._SX411_BO1,204,203,200_.jpg)
The horizon is the apparent line that separates the surface of a celestial body from its sky when viewed from the perspective of an observer on or near the surface of the relevant body. A horizon at sunset in High Desert, California, USA