VIAS Encyclopedia provides a collection of tables and definitions commonly needed in science and engineering.

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Common Constants in Astronomy


Identifier Value Units Description
Astronomical Unit 1.495978706911011 m The astronomical unit (AU) is the approximate the mean distance between Earth and Sun.
Earth Radius 6378000 m mean radius of earth
Earth Acceleration 9.80665 m s-2 gravitational acceleration on earth
Gravitational Constant 6.67310-11 m3kg-1s-2 Newtonian constant of gravitation
Lightyear 9.460536207071015 m A lightyear is the distance light travels in free spaces during a year.
Parsec 3.085677581351016 m The parsec is the distance at which two objects, separated by 1 astronomical unit, appear to be separated by an angle of 1 arcsecond.
Solar Mass 1.988921030 kg solar mass

Home Astronomy and Space Science Common Constants in Astronomy

Last Update: 2004-11-18