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The 42nd parallel north is a circle of latitude that is 42 degrees north of the Earth's equatorial plane. It crosses Europe, the Mediterranean Sea, Asia, the Pacific Ocean, North America, and the Atlantic Ocean. At this latitude the sun is visible for 15 hours, 15 minutes during the summer solstice and 9 hours, 6 minutes during the winter ...
42nd parallel may refer to: 42nd parallel north, a circle of latitude in the Northern Hemisphere; 42nd parallel south, a circle of latitude in the Southern Hemisphere;
North along the east boundary of the Erie Triangle to Lake Erie. [1] [2] Monument along the 42nd parallel where the state line leaves the West Branch of the Delaware and runs along land. The survey of the 42nd parallel north was carried out in 1785–86 and accepted by the two states in 1787. The surveying technique that was used at the time ...
40th parallel north; 41st parallel north; 42nd parallel north; 43rd parallel north; 44th parallel north; 45th parallel north; 46th parallel north; 47th parallel north; 48th parallel north; 49th parallel north; 50th parallel north; 51st parallel north; 52nd parallel north; 53rd parallel north; 54th parallel north; Parallel 54°40′ north; 55th ...
There are five major circles of latitude, listed below from north to south. The position of the Equator is fixed (90 degrees from Earth's axis of rotation) but the latitudes of the other circles depend on the tilt of this axis relative to the plane of Earth's orbit, and so are not perfectly fixed. The values below are for 9 January 2025: [2]
Posidonius calculated the Earth's circumference by reference to the position of the star Canopus.As explained by Cleomedes, Posidonius observed Canopus on but never above the horizon at Rhodes, while at Alexandria he saw it ascend as far as 7 + 1 ⁄ 2 degrees above the horizon (the meridian arc between the latitude of the two locales is actually 5 degrees 14 minutes).
The Earth's orbit, with its axis tilted at 23.5 degrees, exhibits approximate axial parallelism, maintaining its direction towards Polaris (the "North Star") year-round. Together with the Earth's axial tilt, this is one of the primary reasons for the Earth's seasons, as illustrated by the diagram to the right.
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