AUs
Solar system measures
AUs is the plural of AU, an abbreviation with several meanings depending on context.
In astronomy, AU stands for astronomical unit—the average distance from Earth to the Sun, about 93 million miles.
In fan fiction communities, AU means alternate universe—a story that reimagines characters in different settings or circumstances: I've been reading AUs where they meet in college instead.
AU also abbreviates the African Union.
Celestial body position chart
- KeplerPlanetary motion law formulator
- parallaxPosition change from different vantages
- heliocentricSun as orbital center
- perihelionOrbital point nearest sun
aphelion · ecliptic · interplanetary · JPL
ephemeris
Celestial body position chart
- KeplerPlanetary motion law formulator
- parallaxPosition change from different vantages
- heliocentricSun as orbital center
perihelion · aphelion · ecliptic · interplanetary · JPL
AUsangstroms
Ten-billionths of meters
nanometers · picometers · femtometers · micrometers · millimeters