I just need an explanation of a formula, and I think part of it is wrong, so here is the formula:(adsbygoogle = window.adsbygoogle || []).push({});

[tex](T_A/T_G)^2=(R_A/R_B)^3[/tex]

so T is the period and [tex]T_A[/tex] is the period of planet A

then below it is what I think is wrong, [tex]T_G[/tex] G is the Kepler's constant, I'm not sure what that really is

=

[text]R_A[/tex] which is radius of planet A over radius of planet B cubed, this side is right, any help is appreciated thanks

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Planetary Motion Formula

**Physics Forums | Science Articles, Homework Help, Discussion**