"as myrio-) is obsolete and not included among the prefixes when the International System of Units was introduced in 1960. 10 kilometres is equal to: A length of 100 kilometres (about 62 miles), as a rough amount, is relatively common in measurements on Earth and for some astronomical objects. It is the altitude at which the FAI defines spaceflight to begin. To help compare orders of magnitude, this section lists lengths between 100 and 1,000 kilometres (10 and 10 metres). A distance of 100 kilometres is equal to about 62 miles (or ). To help compare different orders of magnitude"
") is known as the geographical mile. Nautical mile A nautical mile (also known as an air mile) is a unit of measurement defined as exactly . Historically, it was defined as one minute of latitude, which is one sixtieth of a degree of latitude – i.e. since a minute of a degree is x = , the Earth's polar circumference is approximately 21,600 nautical miles. It is a non-SI unit which today has a continued use in both air and marine navigation, and for the definition of territorial waters. There is no single internationally agreed symbol. While using M"
"Mile The mile is an English unit of length of linear measure equal to 5,280 feet, or 1,760 yards, and standardised as exactly 1,609.344 metres by international agreement in 1959. With qualifiers, ""mile"" is also used to describe or translate a wide range of units derived from or roughly equivalent to the Roman mile, such as the nautical mile (now 1.852 km exactly), the Italian mile (roughly 1.852 km), and the Chinese mile (now 500 m exactly). The Romans divided their mile into 5,000 roman feet but the greater importance of furlongs in pre-modern England meant that the statute mile"
"Nautical mile A nautical mile (also known as an air mile) is a unit of measurement defined as exactly . Historically, it was defined as one minute of latitude, which is one sixtieth of a degree of latitude – i.e. since a minute of a degree is x = , the Earth's polar circumference is approximately 21,600 nautical miles. It is a non-SI unit which today has a continued use in both air and marine navigation, and for the definition of territorial waters. There is no single internationally agreed symbol. While using M itself, the International Bureau of Weights and"
"are also included in this list because, in terms of length, they fall in between the short West European miles and the long North, Central and Eastern European miles. Similar units: Even in English-speaking countries that have moved from the Imperial to the metric system (for example, Australia, Canada, and New Zealand), the mile is still used in a variety of idioms. These include: Mile The mile is an English unit of length of linear measure equal to 5,280 feet, or 1,760 yards, and standardised as exactly 1,609.344 metres by international agreement in 1959. With qualifiers, ""mile"" is also used"
"Metre The metre (British spelling and BIPM spelling) or meter (American spelling) (from the French unit ""mètre"", from the Greek noun μέτρον, ""measure"") is the base unit of length in some metric systems, including the International System of Units (SI). The SI unit symbol is m. The metre is defined as the length of the path travelled by light in a vacuum in second. The metre was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole – as a result the Earth's circumference is approximately 40,000 km today. In 1799, it was"
"Li (unit) The li (, ""lǐ"", or , ""shìlǐ""), also known as the Chinese mile, is a traditional Chinese unit of distance. The li has varied considerably over time but was usually about a third as long as the English mile and now has a standardized length of a half-kilometer (). This is then divided into 1,500 chi or ""Chinese feet"". The character 里 combines the characters for ""field"" (田, ""tián"") and ""earth"" (土, ""tǔ""), since it was considered to be about the length of a single village. As late as the 1940s, a ""li"" did not represent a fixed"
"of magnitude, this section lists distances starting at 10 Zm (10 m or 1.1 million light years). To help compare different orders of magnitude, this section lists distances starting at 100 Zm (10 m or 11 million light years). The yottametre, or yottameter in the US, ( SI symbol: Ym) is a unit of length in the metric system equal to 10 metres To help compare different orders of magnitude, this section lists distances starting at 1 Ym (10 m or 105.702 million light years). To help compare different orders of magnitude, this section lists distances starting at 10 Ym"
"gigametres (Gm) or 10 million kilometres, or 0.07 Astronomical units). To help compare distances at different orders of magnitude this section lists lengths starting at 10 metres (100 Gm or 100 million kilometres or 0.7 astronomical units). To help compare different distances, this section lists lengths starting at 10 m (1 Tm or 1 billion km or 6.7 astronomical units). To help compare different distances this section lists lengths starting at 10 m (10 Tm or 10 billion km or 67 astronomical units). To help compare different distances this section lists lengths starting at 10 m (100 Tm or 100"
"Parsec The parsec (symbol: pc) is a unit of length used to measure large distances to astronomical objects outside the Solar System. A parsec is defined as the distance at which one astronomical unit subtends an angle of one arcsecond, which corresponds to astronomical units. One parsec is equal to about 3.26 light-years (30 trillion km or 19 trillion miles) in length. The nearest star, Proxima Centauri, is about from the Sun. Most of the stars visible to the unaided eye in the night sky are within 500 parsecs of the Sun. The parsec unit was probably first suggested in"
"To compare different orders of magnitude this section lists lengths between 100 metres and 1000 metres (1 kilometre). 100 metres (sometimes termed a hectometre) is equal to: To help compare different orders of magnitude this section lists lengths between 1 kilometre and 10 kilometres (10 and 10 metres). 1 kilometre (unit symbol km) is equal to: To help compare different orders of magnitude this section lists lengths between 10 and 100 kilometres (10 to 10 metres). The ""myriametre"" (sometimes also spelled ""myriameter"", ""myriometre"" and ""myriometer"") (10,000 metres) is a deprecated unit name; the decimal metric prefix myria- (sometimes also written"
"secondary units (multiples and submultiples) are derived from the basic units by multiplying by powers of ten, i.e. by simply moving the decimal point. Thus the basic metric unit of length is the metre; a distance of 1 m is 1,000 millimetres, or 0.001 kilometres. Metrication is complete or nearly complete in almost all countries. US customary units are heavily used in the United States and to some degree in Liberia. Traditional Burmese units of measurement are used in Burma. U.S. units are used in limited contexts in Canada due to the large volume of trade; there is also considerable"
"billion km or 670 astronomical units). To help compare different distances this section lists lengths starting at 10 m (1 Pm or 1 trillion km or 6685 astronomical units (AU) or 0.11 light years). To help compare different distances this section lists lengths starting at 10 m (10 Pm or 66,800 AU, 1.06 light years). To help compare different distances this section lists lengths between 10 m (100 Pm or 11 light years) and 10 m (106 light years). This list includes distances between 1 and 10 exametres (10 m). To help compare different distances this section lists lengths between"
"ten thousand kilometres), was determined in the late 20th century by space satellites to be 10,002,290 meters. This small error of 2,290 meters equals 1.423 statute miles; the error in such a large measurement amounts to 14½ inches per statute mile. It represents in each meter an error of approximately 0.23 millimetres – slightly more than the width of a single strand of human hair. This discrepancy is sometimes mentioned as ""Méchain's error"", with the suggestion that the tiny variation in the length of the meridian (not detected for nearly two hundred years) can be attributed to Méchain's calculations. But"
"Furlong A furlong is a measure of distance in imperial units and U.S. customary units equal to one eighth of a mile, equivalent to 660 feet, 220 yards, 40 rods, or 10 chains. Using the international definition of the inch as exactly 25.4 millimetres, one furlong is 201.168 metres. However, the United States does not uniformly use this conversion ratio. Older ratios are in use for surveying purposes in some states, leading to variations in the length of the furlong of two parts per million, or about 0.4 millimetres ( inch). This variation is too small to have practical consequences"
"the ellipsoid varies with latitude, being the longest at the pole and the shortest at the equator as is the nautical mile. A metre was originally defined as the 10-millionth part of the length from equator to North Pole along the meridian through Paris (the target was not quite reached in actual implementation, so that is off by 200 ppm in the current definitions). This means that one kilometre is roughly equal to (1/40,000) * 360 * 60 meridional minutes of arc, which equals 0.54 nautical mile, though this is not exact because the two units are defined on different"
"Millimetre The millimetre (International spelling as used by the International Bureau of Weights and Measures; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length. Therefore, there are one thousand millimetres in a metre. There are ten millimetres in a centimetre. One millimetre is equal to micrometres or nanometres. A millimetre is equal to exactly (approximately 0.039370) of an inch. Since 1983, the metre has been defined as ""the length of the path travelled by light in vacuum"
"Metric mile A metric mile is a distance which approximates one statute mile (1609.344 m) at a round figure of metres (the SI or metric unit of length). The term is most commonly used in track running and swimming. In track running, the 1500 m race became the standard middle distance race in Europe in the late 19th century, and has been the standard distance in the Olympic Games since 1896. The distance of the race is sometimes referred to as a metric mile. Prior to metrication, many tracks in the United States and the Commonwealth of Nations were constructed"
"Kilometre The kilometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: km; or ) or kilometer (American spelling) is a unit of length in the metric system, equal to one thousand metres (kilo- being the SI prefix for ). It is now the measurement unit used officially for expressing distances between geographical places on land in most of the world; notable exceptions are the United States and the road network of the United Kingdom where the statute mile is the official unit used. ""k"" (pronounced ) is occasionally used in some English-speaking countries as"
"(exactly astronomical units) corresponds exactly to that derived using the small-angle calculation. This differs from the classic inverse-tangent definition by about 200 km, i.e. only after the 11th significant figure. As the astronomical unit was defined by the IAU (2012) as an exact SI length in metres, so now the parsec corresponds to an exact SI length in metres. To the nearest meter, the small-angle parsec corresponds to 30,856,775,814,913,673 m. The parallax method is the fundamental calibration step for distance determination in astrophysics; however, the accuracy of ground-based telescope measurements of parallax angle is limited to about 0.01 arcseconds, and"
"Siriometer The siriometer is an obsolete astronomical unit of length, defined to be equal to one million astronomical units (au). One siriometer is approximately . The distance from Earth to the star Sirius is then approximately 0.54 siriometers. The unit was proposed in 1911 by Carl V. L. Charlier who used the symbol 'sir.' Others have suggested denoting the unit with the symbol 'Sm'. The siriometer never gained widespread usage. The first General Assembly of the International Astronomical Union in 1922 adopted the parsec as the standard unit of stellar distances, which simplified the definition of absolute magnitude. Use of"
"mil dot spacing change. The USMC standard is that 1 mil (that is, 1 milliradian) equals 3.438 MOA (minute of arc, or, equivalently, minute of angle), while the US Army standard is 3.6 MOA, chosen so as to give a diameter of 1 yard at a distance of 1,000 yards (or equivalently, a diameter of 1 meter at a range of 1 kilometer.) Many commercial manufacturers use 3.5, splitting the difference, since it is easier to work with. It is important to note that angular mil (""mil"") is only an approximation of a milliradian and different organizations use different approximations."
"most practical measurements. Furlong A furlong is a measure of distance in imperial units and U.S. customary units equal to one eighth of a mile, equivalent to 660 feet, 220 yards, 40 rods, or 10 chains. Using the international definition of the inch as exactly 25.4 millimetres, one furlong is 201.168 metres. However, the United States does not uniformly use this conversion ratio. Older ratios are in use for surveying purposes in some states, leading to variations in the length of the furlong of two parts per million, or about 0.4 millimetres ( inch). This variation is too small to"
"a ""mil"" (Scandinavian mile) is informally equal to 10 km, and this has continued to be the predominantly used unit in conversation when referring to geographical distances. In the 19th century, Switzerland had a non-metric system completely based on metric terms (e.g. 1 ""Fuss"" (foot) = 30 cm, 1 ""Zoll"" (inch) = 3 cm, 1 ""Linie"" (line) = 3 mm). In China, the ""jin"" now has a value of 500 g and the liang is 50 g. It is difficult to judge the degree to which ordinary people change to using metric in their daily lives. In countries that have"
"the mesures usuelles system, such that 1m was exactly toise. The Russian verst was 1.0668km. The Swedish mil was 10.688km, but was changed to 10km when Sweden converted to metric units. Metre The metre (British spelling and BIPM spelling) or meter (American spelling) (from the French unit ""mètre"", from the Greek noun μέτρον, ""measure"") is the base unit of length in some metric systems, including the International System of Units (SI). The SI unit symbol is m. The metre is defined as the length of the path travelled by light in a vacuum in second. The metre was originally defined"
"of Pakistan adopted the International System of Units (SI) Kos is an ancient unit of distance used in South Asia which is about 2.25 miles. Kos may also refer to about 1.8 km (1⅛ mile) or 3.2 km (2 miles). The Mughal Empire used Farsang (Parsang) for distance, which was in principle the distance a horse would walk in an hour, about 3 miles = 12,000 cubits. A Kanal is a unit of area, equivalent to 5445 square feet or one-eighth of an acre. It is mainly used in Punjab province of Pakistan. Under British rule the Marla and Kanal"
"Astronomical unit The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun. However, that distance varies as Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year. Originally conceived as the average of Earth's aphelion and perihelion, since 2012 it has been defined as exactly metres or about . The astronomical unit is used primarily for measuring distances within the Solar System or around other stars. It is also a fundamental component in the definition of another unit of astronomical length,"
"Data mile In radar-related subjects and in JTIDS, a data mile is a unit of distance equal to 6000 feet (1.8288 kilometres or 0.987 nautical miles). An international mile is exactly 0.88 of a data mile. The speed of light is 983571056 ft/s, or about one foot per nanosecond. If it were exactly one foot per nanosecond, and a target was one data mile away, then the radar return from that target would arrive 12 microseconds after the transmission. (Recall that radar was developed during World War II in America and England, while both were using English units. It was"
"Biblical mile Biblical mile () is a unit of distance on land, or linear measure, principally used by Jews during the Herodian dynasty to tell short distances between cities and to mark the Sabbath limit, equivalent to about ⅔ of an English statute mile, or what was about four furlongs (""stadia""). The basic Jewish traditional unit of distance was the cubit (), each cubit being roughly between The standard measurement of the biblical mile, or what is sometimes called ""tǝḥūm šabbat"" (Sabbath limit; Sabbath boundary), was 2,000 cubits. The word ""mīl"", as used in Hebrew texts between the 2nd and"
"Parliament, which set it as a distance of 1,760 yards. Under American law, however, the ""statute mile"" refers to the US survey mile. Foreign and historical units translated into English as miles usually employ a qualifier to describe the kind of mile being used but this may be omitted if it is obvious from the context, such as a discussion of the 2nd-century Antonine Itinerary describing its distances in terms of ""miles"" rather than ""Roman miles"". The mile has been variously abbreviated—with and without a trailing period—as m, M, ml, and mi. The American National Institute of Standards and Technology"
"Chain (unit) The chain is a unit of length equal to 66 feet (22 yards). It is subdivided into 100 links or 4 rods. There are 10 chains in a furlong, and 80 chains in one statute mile. In metric terms, it is 20.1168 m long. By extension, chainage (running distance) is the distance along a curved or straight survey line from a fixed commencing point, as given by an odometer. The chain has been used for several centuries in England and in some other countries influenced by English practice. In the United Kingdom, there were 80 chains to the"
"a unit of distance in cosmology, defined as formula_77 — the speed of light multiplied by the Hubble time. It is equivalent to 4,550 million parsecs or 14.4 billion light years. (The numerical value of the Hubble length in light years is, by definition, equal to that of the Hubble time in years.) The Hubble distance would be the distance between the Earth and the galaxies which are ""currently"" receding from us at the speed of light, as can be seen by substituting formula_78 into the equation for Hubble's law, . The Hubble volume is sometimes defined as a volume"
"latitude could be used as the basis for a unit of measurement for distance and proposed the nautical mile as one minute or one-sixtieth () of one degree of latitude. As one degree is of a circle, one minute of arc is of a circle (or, in radians, ). These sexagesimal (base 60) units originated in Babylonian astronomy. Gunter used Snell's circumference to define a nautical mile as 6,080 feet, the length of one minute of arc at 48 degrees latitude. Since the earth is not a perfect sphere but is an oblate spheroid with slightly flattened poles, a minute"