What is another word for astronomical year?
Pronunciation: [ɐstɹənˈɒmɪkə͡l jˈi͡ə] (IPA) 
An astronomical year is defined as the time it takes for the Earth to complete one orbit around the sun. It lasts approximately 365.25 days, which is why we have a leap year every four years to balance out the extra quarter day. There are several synonyms for this term, including sidereal year, tropical year, and orbital year. The sidereal year is the time it takes for the Earth to complete one orbit around the sun relative to a fixed point in the sky. The tropical year is the time it takes for the Earth to complete one orbit around the sun relative to the position of the vernal equinox. The orbital year is simply another term for the astronomical year.
