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Opposition (astronomy and astrology)
Opposition is a word used in astronomy and astrology to show when one celestial body is on the opposite side of the sky when viewed from a particular place (usually the Earth). In particular, two planets are in opposition to each other when their ecliptic longitudes differ by 180°.
The symbol of opposition is ☍.
- it is visible almost all night, rising around sunset, culminating around midnight and setting around sunrise;
- its orbit brings it closest to the Earth, making it appear bigger and brighter.
- the opposition effect increases the reflected light from bodies with unobscured rough surfaces
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