galactic year

短语

词形变化

galactic years 复数 galactic years

别名

GY

释义与例句

n.
  1. 1.

    The time taken for the Solar System to orbit around the center of the Milky Way Galaxy, estimated to be from 225 to 250 million years.

    天文
  2. 2.

    The time taken for a celestial body to complete a quasi-orbit in a galaxy.

    天文 引申义