In astrology, the Solar Age is identified with the constellation of the zodiac that contains the Sun at the moment of the vernal equinox. This location describes a slow apparent circle through the sky due to the precession of the equinoxes, with each age lasting, on average, one-twelfth of the complete rotation, or approximately 2,100 years.
The current Age of Pisces, which started around 150 BC, depending on where along the ecliptic the division between the constellations of Aquarius and Pisces is set, is due to end around 2600, when the apparent point of the vernal equinox crosses the dividing line into the constellation of Aquarius. The Age of Pisces will then be replaced by the Age of Aquarius.
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Astrological Age (http://www.geocities.com/astrologyages/astrologicalage.htm)
In broad terms, the charted regions of the solar system consist of the Sun, four rocky bodies close to it called the terrestrial planets, an inner belt of rocky asteroids, four gas giant planets, and an outer belt of small, icy bodies known as the Kuiper belt.
The solar wind extends to a point roughly 130 AU from the Sun, whereupon it surrenders to the surrounding envionment of the interstellar medium.
The edge of this bubble is known as the termination shock; the point at which the solar wind collides with the opposing winds of the interstellar medium.
Passive solar systems are systems that do not involve the input of any other forms of energy apart from the incoming sunlight, although (in the case of solar heat through windows) there may be draperies or panels used to reduce nighttime heat losses and thermostatically or manually operated vents (but not fans) to prevent overheating.
Solar hot water systems are generally composed of solar thermal collectors, a fluid system to move the heat from the collector to its point of usage, and a reservoir to stock the heat for subsequent use.
Solar cells, also referred to as photovoltaic cells, are devices or banks of devices that use the photovoltaic effect of semiconductors to generate electricity directly from sunlight.
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