galactic year

galactic year
a) the time it takes for the Solar System to orbit around the center of the Milky Way Galaxy, estimated to be from 225 to 250 million years.
b) by extension, the time it takes a celestial body to complete a quasi-orbit in a galaxy

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  • Galactic year — The galactic year, also known as a cosmic year, is the duration of time required for the solar system to orbit once around the center of the Milky Way galaxy. [http://www.csi.uottawa.ca:4321/astronomy/index.html#cosmicyear Astronomy Knowledge… …   Wikipedia

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  • galactic year — Astron. the duration of a complete rotation of the Milky Way, approximately 200 million years. * * * …   Universalium

  • galactic year — Astron. the duration of a complete rotation of the Milky Way, approximately 200 million years …   Useful english dictionary

  • Year — A year (from Old English gēar) is the orbital period of the Earth moving around the Sun. For an observer on Earth, this corresponds to the period it takes the Sun to complete one course throughout the zodiac along the ecliptic. In astronomy, the… …   Wikipedia

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