Earth
As of 2012 the most used prime meridian for the Earth is the IERS Reference Meridian (IRM). It passes about 5.3 arcseconds east of Airy's transit circle or about 102 metres (335 ft) at the latitude of the Royal Observatory, Greenwich, London. A current convention on the Earth uses the opposite of the IRM as the basis for the International Date Line.
Read more about this topic: Prime Meridian
Famous quotes containing the word earth:
“A river seems a magic thing. A magic, moving, living part of the very earth itself—for it is from the soil, both from its depth and from its surface, that a river has its beginning.”
—Laura Gilpin (1891–1979)
“Were they to emigrate in a body to man the navies of the moon, almost every thing would stop here on earth except its revolution on its axis, and the orators in the American Congress.”
—Herman Melville (1819–1891)
“All places are alike,
And every earth is fit for burial.”
—Christopher Marlowe (1564–1593)