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As each day is divided into 24 hours, the first hour of a day is ruled by the planet three places down in the Chaldean order from the planet ruling the first hour of the preceding day; [2] i.e. a day with its first hour ruled by the Sun ("Sunday") is followed by a day with its first hour ruled by the Moon ("Monday"), followed by Mars ("Tuesday ...
Ganymede orbits Jupiter at a distance of 1,070,400 kilometres (665,100 mi), third among the Galilean satellites, [26] and completes a revolution every seven days and three hours (7.155 days [39]). Like most known moons, Ganymede is tidally locked, with one side always facing toward the planet, hence its day is also seven days and three hours. [40]
The ionizing radiation level at Europa's surface is equivalent to a daily dose of about 5.4 Sv (540 rem), [59] an amount that would cause severe illness or death in human beings exposed for a single Earth day (24 hours). [60] A Europan day is about 3.5 times as long as an Earth day. [61]
The upper section contained 7 dials, each about 30 cm in diameter, showing the positional data for the Primum Mobile, Venus, Mercury, the moon, Saturn, Jupiter, and Mars. Directly above the 24-hour dial is the dial of the Primum Mobile , so called because it reproduces the diurnal motion of the stars and the annual motion of the sun against the ...
Io (/ ˈ aɪ. oʊ /), or Jupiter I, is the innermost and second-smallest of the four Galilean moons of the planet Jupiter.Slightly larger than Earth's moon, Io is the fourth-largest moon in the Solar System, has the highest density of any moon, the strongest surface gravity of any moon, and the lowest amount of water by atomic ratio of any known astronomical object in the Solar System.
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From May 25, 2024 to June 9, 2025, the expensive planet Jupiter will be transiting the sign of Gemini for the first time in 12 years. Jupiter will stay in the air sign for the next 12 months ...