Sidereal Year

Science / Tides and Currents / Sidereal Year: Average period of the revolution of the Earth around the Sun with respect to a fixed star. Its length is approximately 365 .256,4 mean solar days.
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Sidereal Time

Science / Astrology / Sidereal Time: Time measured in relation to fixed stars, as distinguished from clock time, based upon the Sun's position relative to Earth. Astrological time data is listed in sidereal time units. MORE

Sidereal Year

Science / Tides and Currents / Sidereal Year: Average period of the revolution of the Earth around the Sun with respect to a fixed star. Its length is approximately 365 .256,4 mean solar days. MORE

Sidereal Zodiac

Science / Astrology / Sidereal Zodiac: Based on the division of the circle of twelve constellations: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces; the basis for sidereal astrology. MORE

Six-Year Molar

Health / Dentistry / Six-Year Molar: The first permanent tooth to erupt, usually between the ages of five and six. MORE

Sidereal Month

Science / Tides and Currents / Sidereal Month: Average period of the revolution of the Moon around the Earth with respect to a fixed star, equal to 27.321,66 1 mean solar days. MORE

Sidereal Day

Science / Astrology / Sidereal Day: Twenty-four sidereal hours equal to 23 hours, 56 minutes and 4 seconds of clock time. MORE