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Eclipses from 2001 to 2002 are included on the end to complete the final set. [2] Date Time UT (hr:mn) Type Node Saros Gamma Magnitude Duration (min) Moon position ...
Galileo [9] [10] discovered the Galilean moons. These satellites were the first celestial objects that were confirmed to orbit an object other than the Sun or Earth. Galileo saw Io and Europa as a single point of light on 7 January 1610; they were seen as separate bodies the following night. [11] Callisto: Jupiter IV o: 8 January 1610 p: 13 ...
The Moon rises 30 to 70 minutes (should be a fixed number, about 50 minutes, if it's the same 13 degrees) later each day/night than the day/night before, due to the fact that the Moon moves 13 degrees every day. Hence, the Earth must move 13 degrees after completing one rotation for the Moon to be visible.
Mayan astronomers discover an 18.7-year cycle in the rising and setting of the Moon. From this they created the first almanacs – tables of the movements of the Sun, Moon, and planets for the use in astrology. In 6th century BCE Greece, this was also discovered and was used to predict eclipses.
Over the following three centuries, only a few more moons were discovered. Missions to other planets in the 1970s, most notably the Voyager 1 and 2 missions, saw a surge in the number of moons detected, and observations since the year 2000, using mostly large, ground-based optical telescopes, have discovered many more, all of which are irregular.
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Experts recommend stargazing on the nights surrounding the new moon as it is the time when the sky is the darkest. In 2025, the new moons during summer fall on July 10, Aug. 9 and Sept. 7.
2nd century BC: Hipparchos discovers the apsidal precession of the Moon's orbit. [62] 2nd century BC: Hipparchos discovers Axial precession. 2nd century BC: Hipparchos measures the sizes of and distances to the Moon and Sun. [63] 190 BC: Magic squares appear in China. The theory of magic squares can be considered the first example of a vector ...