Matches in DBpedia 2014 for { ?s ?p An astronomical unit (abbreviated au; sometimes AU,[citation needed] a.u.[citation needed] and ua) is a unit of length, roughly the distance from the Earth to the Sun. However, that distance varies as the Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year. Originally, each distance was measured through observation, and the au was defined as their average, half the sum of the maximum and minimum, making the unit a kind of medium measure for Earth-to-Sun distance. It is now defined more precisely as 149597870700 metres (about 93 million miles).The astronomical unit is used primarily as a convenient yardstick for measuring distances within the Solar System. However, it is also a fundamental component in the definition of another critical unit of astronomical length, the parsec.. }
Showing items 1 to 1 of
1
with 100 items per page.
- Astronomical_unit abstract "An astronomical unit (abbreviated au; sometimes AU,[citation needed] a.u.[citation needed] and ua) is a unit of length, roughly the distance from the Earth to the Sun. However, that distance varies as the Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year. Originally, each distance was measured through observation, and the au was defined as their average, half the sum of the maximum and minimum, making the unit a kind of medium measure for Earth-to-Sun distance. It is now defined more precisely as 149597870700 metres (about 93 million miles).The astronomical unit is used primarily as a convenient yardstick for measuring distances within the Solar System. However, it is also a fundamental component in the definition of another critical unit of astronomical length, the parsec.".