Astronomical length units
* m AU ly pc *
m 1 6.685 e-12 1.057 e-16 3.241 e-17 m
AU 1.496 e11 1 1.581 e-5 4.848 e-6 AU
ly 0.946 e16 63271.5 1 0.3066 ly
pc 3.086 e16 206265 3.26 1 pc
* *
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*
m = meter, the length unit of the SI-system.
AU = Astronomical Unit, the mean distance between the Earth and the Sun.
ly = light year, the distance that the light travels in vacuum during one year.
pc = parsec (parallel second) a unit derived from the diameter of Earth's orbit.


Astronomical Data
* Diameter Mass Mean distance Explanation
Sun 1392000 km 1.989 e30 kg apr. 30000 ly from the center of the galaxy
Mercury 2440 km 3.3 e23 kg 0.387 AU from Sun
Venus 12104 km 4.87 e24 kg 0.723 AU from Sun
Earth 12756 km 5.974 e24 kg 1 AU from Sun
Moon 3476 km 7.348 e22 kg 0.00257 AU from Earth
Mars 6794 km 6.42 e23 kg 1.524 AU from Sun
Jupiter 142984 km 1.9 e27 kg 5.203 AU from Sun
Saturn 120536 km 5.69 e26 kg 9.537 AU from Sun
Uranus 51118 km 8.66 e25 kg 19.2 AU from Sun
Neptune 49528 km 1.03 e26 kg 30.01 AU from Sun
Pluto 2302 km 1.5 e22 kg 39.5 AU from Sun
Milky Way 100000 ly >2.0 e11 suns 5.0 e7 ly from the Virgo/Coma cluster

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