Nadir is employed during remote sensing of the atmosphere, as well as when an astronaut faces the Earth while performing a spacewalk. The term nadir can also be used to represent the lowest point reached by a celestial body during its apparent orbit around a given point of observation. This can be used to describe the location of the Sun, but it is only technically accurate for one latitude at a time and only possible at the low latitudes. The sun is said to be at the nadir at a location when it is at the zenith at the location's antipode
Opposite (semantics) Opposite (semantics) In lexical semantics, opposites are words lying in an inherently incompatible binary relationship, like the opposite pairs "big : small", "long : short", and "precede : follow". The notion of incompatibility here refers to the fact that one word in an opposite pair entails that it is not the other pair member. For example, something that is "long" entails that it is not "short". It is referred to as a 'binary' relationship because there are two members in a set of opposites. The relationship between opposites is known as opposition. A member of a pair of opposites can