Megametre

Megametre
1 megametre =
SI units
1,000.00 km 1.000×10^6 m
Astronomical units
6.685×10^−6 AU 105.7×10^−12 ly
US customary / Imperial units
621.37 mi 3.281×10^6 ft

A megametre (American spelling: megameter, symbol Mm) is a unit of length in the metric system, equal to one million metres, the SI base unit of length, hence to 1,000 km or approximately 621.37 miles.

Megametres (from the Greek words megas = big and metro = count/measure) are rarely seen in practical use, e.g. "5000 km" is much more common than "5 Mm". Their symbol (Mm) can also be confused with millimetres (mm). Megametres are also occasionally found in science fiction.[citation needed]

See also

Reference


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  • Megametre — Megameter Meg a*me ter, Megametre Meg a*me tre, n. [Mega + meter, metre, n., 2.] In the metric system, one million meters, or one thousand kilometers. [1913 Webster] …   The Collaborative International Dictionary of English

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  • megametre — noun A distance of 1,000 km. Symbol: Mm …   Wiktionary

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  • 1 megametre — Small planets, the Moon and dwarf planets in our solar system have diameters from one to ten million metres. Top row: Mars (left), Mercury (right); bottom row: Moon (left), Pluto (center), and Haumea (right), to scale …   Wikipedia

  • 1 E+30 m³ — To help compare different orders of magnitudes this page lists volumes between one thousand cubic gigametre and ten thousand cubic terametre (10^{30} to 10^{40} cubic metres). See also volumes or capacities of other orders of magnitude.* Volumes… …   Wikipedia

  • 1 E+24 m³ — To help compare different orders of magnitudes this page lists volumes between one million cubic megametres and one one cubic gigametre (10^{24} to 10^{27} cubic metres). See also volumes or capacities of other orders of magnitude.* Volumes… …   Wikipedia

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