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Astronomy: Astronomical Units and Constants

 
Essential Desk Reference: Astronomy: Astronomical Units and Constants

Name

Symbol

Metric Equivalent

Astronomical unit

AU

1.496 × 1011 m

Earth mass

MImage

5.98 × 1024 kg

Gravitational Constant

G

( 6.6726 ± 0.0001) × 10–11 N·m2/kg2

Light year

ly

9.463 × 1015 m

Parsec

pc

3.086 × 1016 m [3.26 ly]

Solar luminosity

LImage

3.9 × 1026 Watts

Solar mass

MImage

1.99 × 1030 kg

Solar Temperature

TImage

5.780 × 103 K


Image Dolan, C. “Physical Constants and Astronomical Data,” www.astro.wisc.edu/~dolan/constants.html
NASA Astronomical Data Center. “Units and Constants,” http://adc.gsfc.nasa.gov/adc/quick_ref/ref_units.html#astroconst
Smith, S. “Some Non-SI Units,” http://alpha.lasalle.edu/~smithsc/Astronomy/Units/astro_units.html



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Essential Desk Reference. The Essenial Desk Reference Dictionary. Copyright © 2002 by Oxford University Press, Inc.. All rights reserved.  Read more