ANTISOLAR POINT Meaning and
Definition
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The antisolar point is the opposite point in the sky, precisely opposite to the position of the sun, when observed from a specific location on the Earth's surface. It corresponds to the center of the circular shadow that is cast by an observer's head or body on a flat surface. It is located on the celestial sphere along the line that connects the observer's position with the center of the Earth.
Due to the way sunlight is scattered and refracted in the Earth's atmosphere, the antisolar point is not necessarily directly opposite the sun. It can be slightly shifted, sometimes even appearing below the horizon. This phenomenon is mainly caused by atmospheric particles, such as dust or water droplets, which redirect the light and create various optical effects.
The antisolar point is particularly notable during certain atmospheric conditions, such as when the sky is covered with clouds or when there are suspended particles in the air, as it enhances the visibility of phenomena like glories, Brocken spectres, and rainbows. It is also a crucial reference point for determining the position of celestial objects, as it guides astronomers or navigators to identify the direction opposite to the sun.
In summary, the antisolar point is the exact location in the sky that is directly opposite the position of the sun when observed from a specific point on Earth's surface. It is influenced by atmospheric scattering and can be essential in understanding various optical and celestial phenomena.
Etymology of ANTISOLAR POINT
The word "antisolar" is composed of two parts: "anti-" and "solar".
The prefix "anti-" comes from the Ancient Greek word "antí", meaning "opposed to" or "against". It is often used to indicate opposition, contrast, or negation.
The term "solar" is derived from the Latin word "sōlāris", which means "pertaining to the sun". It is directly related to the noun "sōl", meaning "sun".
Therefore, the term "antisolar" indicates something that is opposite or contrary to the sun.
The word "point" in "antisolar point" refers to a specific location or position.
So, altogether, the etymology of "antisolar point" suggests a location that is opposite or diametrically opposed to the position of the sun.
