parsec
Noun
Meaning
a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc; equivalent to 3.262 light years
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Examples
Distances in parsecs Distances less than a parsec Distances expressed in fractions of a parsec usually involve objects within a single star system.
Calculating the value of a parsec Diagram of parsec.
For a typical cluster with 1,000 stars with a 0.5 parsec half-mass radius, on average a star will have an encounter with another member every 10 million years.
He proposed the name astron, but mentioned that Carl Charlier had suggested siriometer and Herbert Hall Turner had proposed parsec.
If this particular quasar and the Milky Way could be seen side by side at the same distance of one parsec and the Milky Way's stars reduced to a single point, the quasar would be 5 magnitudes (or 100 times) brighter than the Milky Way.
So, for example: * One parsec is approximately 3.26 light-years.