astronomical units
Sun-Earth distance measures
An astronomical unit is the average distance from Earth to the Sun—about 93 million miles or 150 million kilometers.
It serves as a convenient yardstick for measuring distances within our solar system: Mars orbits at roughly 1.5 astronomical units from the Sun.
Abbreviated AU.
- kilometresMetric distance units
- solar systemStar and orbiting bodies
- planetsStar-orbiting celestial bodies
- outer planetsPlanets past the asteroids
- distanceSpace between two points
solar orbit · baseline measurement · aphelion · sun · Alpha Centauri · light-year · barycenter · deep space · space · ephemeris · Oort cloud · orbital mechanics · planetary motion · interplanetary travel · intergalactic space · retrograde motion · declination · perihelion
astronomical unitsmegaparsecs
Units measuring galactic separations
light-years · parsecs · angstroms · nanometers · picometers
astronomical unitsmeters
Measuring devices
kilometers · miles · feet · inches · centimeters
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