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cosmic year
subjectfact 
cosmic yearhas value 225 million yearshas source: Abbot, D. 1984 Astronomers, Peter Bedrick Books, New York, 2001-09-27 09:32:54.0
has definition Time the Sun takes to "orbit" in galactic rotation: about 225 million years.has source: Abbot, D. 1984 Astronomers, Peter Bedrick Books, New York, 2001-09-27 09:32:54.0
is an instance of time unit2001-09-27 09:32:54.0
time unitis a unit of time2001-09-27 09:32:52.0
unithas historical origin2001-09-27 09:32:42.0
represents2001-09-27 09:32:42.0