Antisolar point Antisolar point The antisolar point is the abstract point on the celestial sphere directly opposite of the Sun from an observer's perspective. This means that the antisolar point lies above the horizon when the Sun is below it, and vice versa. On a sunny day, the antisolar point can be easily found; it is located within the shadow of the observer's head. Like the zenith and nadir, the antisolar point is not fixed in three-dimensional space, but is defined relative to the observer. Each observer has their own antisolar point, which moves along with them as they change position. The
Nadir and the sun is 90 degrees below the horizon. This only occurs between the Tropic of Cancer and Tropic of Capricorn at solar midnight. The tropic circles experience this once a year on their winter solstices and all other tropical regions experience this twice. The term nadir also applies to video footage produced for use in Virtual Reality aka 360º video. Cameras capable of capturing spherical footage are generally mounted on a tripod or extension boom that sits directly below and perpendicular to the horizontal plane of the camera lenses (when using two, 180º FOV lenses). In the case of