Parsec

by Dominic Ford, Editor

The parsec is a unit of length which is equal to:

$$3.0857 \times 10^{16}$$ m

$$3.26$$ light years

$$206,264.8$$ astronomical units

It is used to measure the very largest structures in the Universe. For example, the centre of the Milky Way galaxy lies at a distance of 8.1 kpc, where one kiloparsec equals one thousand parsecs. The distance to the nearest galaxy of a similar size to our own, the Andromeda Galaxy (M31) is around 780 kpc.

Ashburn

 Latitude: Longitude: Timezone: 39.04°N 77.49°W EDT

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