Science / Tides and Currents / Aphelion: The point in the orbit of the Earth (or other planet, etc.) Farthest from the Sun.
Science / Astrology / Perihelion: The point in a planet's orbit that lies closest to the Sun. MORE
Science / Tides and Currents / Apsides: The points in the orbit of a planet or moon which are the nearest and farthest from the center of attraction. In the Earth's orbit these are called perihelion and aphelion, and in the Moon's orbit, pe MORE
Science / Astrology / Elongation: The distance of a planet from the Sun, as viewed from Earth. The maximum elongation for the inferior planets is 28° for Mercury, and 48° for Venus. Mercury can therefore only form a conjunction and MORE