G

6.672 x 10-11Nm2kg-2

Boltzmann's constant

k

1.380 65 x 10-23 JK-1

Planck's constant

h

6.62607 x 10-34Js

Stefan's constant

a

5.6704 x 10-8Wm-2 K-4

Astronomical unit

0 0

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