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  2. Equator - Wikipedia

    en.wikipedia.org/wiki/Equator

    The equator passes through the land of eleven sovereign states. Indonesia is the country straddling the greatest length of the equatorial line across both land and sea. Starting at the Prime Meridian and heading eastwards, the equator passes through:

  3. String girdling Earth - Wikipedia

    en.wikipedia.org/wiki/String_girdling_Earth

    The answer is that a cat will easily pass through the gap, the size of which will be ⁠ 1 / 2 π ⁠ metres or about 16 cm (6.3 in). Even more surprising is that the size of the sphere or circle around which the string is spanned is irrelevant, and may be anything from the size of an atom to the Milky Way — the result depends only on the ...

  4. Longitude - Wikipedia

    en.wikipedia.org/wiki/Longitude

    A geographical mile is defined to be the length of one minute of arc along the equator (one equatorial minute of longitude) therefore a degree of longitude along the equator is exactly 60 geographical miles or 111.3 kilometers, as there are 60 minutes in a degree. The length of 1 minute of longitude along the equator is 1 geographical mile or 1 ...

  5. 10th parallel south - Wikipedia

    en.wikipedia.org/wiki/10th_parallel_south

    Countries entirely south of 10° S. Starting at the Prime Meridian and heading eastwards, the parallel 10° south passes through: Coordinates Country, territory or ...

  6. IERS Reference Meridian - Wikipedia

    en.wikipedia.org/wiki/IERS_Reference_Meridian

    The most important reason for the 5.3 seconds of longitude offset between the IERS Reference Meridian and the Airy transit circle is that the observations with the transit circle were based on the local vertical, while the IERS Reference is a geodetic longitude, that is, the plane of the meridian contains the center of mass of the Earth.

  7. List of mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_mnemonics

    THE PLAZA PAD is another mnemonic for the first 11 (and most important) Ionian philosophers: Thales, Heraclitus, Empedocles, Protagoras, Leucippus, Anaximander, Zeno, Anaximenes, Parmenides, Anaxagoras, Democritus. SPA is a mnemonic for the philosophers Socrates, Plato, and Aristotle in their order of appearance, Socrates first.

  8. 55th parallel north - Wikipedia

    en.wikipedia.org/wiki/55th_parallel_north

    The 55th parallel north is a circle of latitude that is 55 degrees north of the Earth's equatorial plane.It crosses Europe, Asia, the Pacific Ocean, North America, and the Atlantic Ocean.

  9. 49th parallel north - Wikipedia

    en.wikipedia.org/wiki/49th_parallel_north

    The 49th parallel north is a circle of latitude that is 49° north of Earth's equator.It crosses Europe, Asia, the Pacific Ocean, North America, and the Atlantic Ocean.. The city of Paris is about 15 km (9 mi) south of the 49th parallel and is the largest city between the 48th and 49th parallels.