19 relations: Ancient Greek, Astronomy & Astrophysics, Binary prefix, Electricity sector of the United States, Electronvolt, Exabyte, Globular cluster, International Bureau of Weights and Measures, International System of Units, Joule, Light-year, Metric prefix, Metric system, Omega Centauri, Orders of magnitude (length), Orders of magnitude (numbers), Orders of magnitude (time), Star, Unit prefix.

## Ancient Greek

The Ancient Greek language includes the forms of Greek used in ancient Greece and the ancient world from around the 9th century BC to the 6th century AD.

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## Astronomy & Astrophysics

Astronomy & Astrophysics is a peer-reviewed scientific journal covering theoretical, observational, and instrumental astronomy and astrophysics.

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## Binary prefix

A binary prefix is a unit prefix for multiples of units in data processing, data transmission, and digital information, notably the bit and the byte, to indicate multiplication by a power of 2.

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## Electricity sector of the United States

The electricity sector of the United States includes a large array of stakeholders that provide services through electricity generation, transmission, distribution and marketing for industrial, commercial, public and residential customers.

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## Electronvolt

In physics, the electronvolt (symbol eV, also written electron-volt and electron volt) is a unit of energy equal to approximately joules (symbol J).

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## Exabyte

The exabyte is a multiple of the unit byte for digital information.

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## Globular cluster

A globular cluster is a spherical collection of stars that orbits a galactic core as a satellite.

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## International Bureau of Weights and Measures

The International Bureau of Weights and Measures (Bureau international des poids et mesures) is an intergovernmental organization established by the Metre Convention, through which Member States act together on matters related to measurement science and measurement standards.

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## International System of Units

The International System of Units (SI, abbreviated from the French Système international (d'unités)) is the modern form of the metric system, and is the most widely used system of measurement.

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## Joule

The joule (symbol: J) is a derived unit of energy in the International System of Units.

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## Light-year

The light-year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles.

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## Metric prefix

A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or fraction of the unit.

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## Metric system

The metric system is an internationally adopted decimal system of measurement.

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## Omega Centauri

Omega Centauri (ω Cen or NGC 5139) is a globular cluster in the constellation of Centaurus that was first identified as a non-stellar object by Edmond Halley in 1677.

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## Orders of magnitude (length)

The following are examples of orders of magnitude for different lengths.

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## Orders of magnitude (numbers)

This list contains selected positive numbers in increasing order, including counts of things, dimensionless quantity and probabilities.

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## Orders of magnitude (time)

An order of magnitude of time is (usually) a decimal prefix or decimal order-of-magnitude quantity together with a base unit of time, like a microsecond or a million years.

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## Star

A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.

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## Unit prefix

A unit prefix is a specifier or mnemonic that is prepended to units of measurement to indicate multiples or fractions of the units.

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## Redirects here:

1000000000000000000, Exa, Exa (SI prefix), Exa (decimal prefix), Exa (metric prefix), Exa (unit prefix).