In what year did the International Astronomical Union (IAU) redefine the AU to have an exact, fixed numerical value?
Answer
2012
The IAU made a significant decision in 2012 to redefine the Astronomical Unit, giving it an exact, fixed numerical value independent of the Earth's actual orbit.
Related Questions
What specific yardstick is best suited for describing vast distances within our solar system?What was the primary historical definition of the Astronomical Unit?Why did the historical, observational definition of the AU create challenges for astronomers?In what year did the International Astronomical Union (IAU) redefine the AU to have an exact, fixed numerical value?What is the precise modern, fixed value of 1 AU expressed in meters?Approximately how many Astronomical Units are equivalent to one light-year?What is the approximate average orbital distance of Jupiter from the Sun in AU?Which unit, inherently related to the AU through geometry, is approximately equal to 206,265 AU?What is the approximate time light takes to travel the distance of one Astronomical Unit?How is the diameter of the Sun expressed relative to the Astronomical Unit?