The time when the solar system orbits around the center of the Milky Way
The Galaxy Year (GY), also known as the cosmic year, issolar systemstaytrackUp windingGalactic centerOne week's revolution,estimateBetween 225 million and 250 million "Earth years".
Chinese name
Galactic Year
Alias
Cosmic year
Abbreviation
GY
Interpretation
Around the center of the Milky WayrevolutionWeek-longtime
Compared with the Milky Way YearearthYear (the time interval when the earth orbits the sun once) and month（MoonThe time interval of circling the earth in orbit) can be explained by providing a more "understandable" unituniverseAnd geological age.In contrast, the scale of "one billion years" is too large for geology, and "one million years" is too small, which will show a considerable number.
Historical chronology
Announce
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This chronology starts fromsolar systemThe birth of is considered to be the 20th year of the Milky Way.
