astronomical year
ESTIMATED PERIOD OF TIME FOR THE EARTH'S ORBIT AROUND THE SUN AND OBSERVED AT A FIXED GEOGRAPHIC POINT (AVERAGING 365.24 DAYS); BASE LATER MODIFIED TO DEFINE OR ADJUST VARIOUS CALENDARS
Years; Eclipse year; Year duration; Anomalistic year; Ecliptic year; Astronomical year; Mega-annum; Giga-annum; Draconitic year; Heliacal year; Annus; Ma (unit); Tya (unit); Exayear; Zettayear; Yottayear; Petayear; Terayear; Megayear; Yearly; Gregorian Year; Gigaannum; Megaannum; Exa-annum; Earth years; Earth year; Ga (unit); Kiloannum; Exaannum; Twelvemonth; Mega Year; Annum (unit); A (year); Annum; Dracontic year; Petaanna; Gigaanna; Yaer; The Year; Gigaannus; Megaannus; Kiloannus; The year; Y and yr; SI annus; SI year; Draconic year; Years ago; Bya (unit); Kiloannums; Vague year; Kya (unit); A (unit); Time ago
anno astronomico, l"anno il quale la terra gira intorno al sole