Definition of parsec in English:
A unit of distance used in astronomy, equal to about 3.26 light years (3.086 × 1013 kilometers). One parsec corresponds to the distance at which the mean radius of the earth’s orbit subtends an angle of one second of arc.
- But cosmologists are so comfortable with millions and billions that none of them feel the urge to invent a unit much beyond the light-year or the parsec.
- I mean, all the ones that I've looked at so far are within 100 parsecs of 300 light years of the Sun.
- For reference, one parsec is around three light years.
Definition of parsec in:
- British & World English dictionary
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.
Most popular in the US
Most popular in the UK
Most popular in Canada
Most popular in Australia
Most popular in Spain
Most popular in Malaysia
Most popular in Pakistan