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Mass of the sun equation

  • #1
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  • #2
ideasrule
Homework Helper
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ok, so if my equation to find the mass of the sun is:
T²/R³ = 4п²/GM
and i used the orbital period (T²)(in seconds) and the distance from the sun (R³)(in metres) of say, venus, then i transform the equation to find "M" and i get:

M = 4π²(R³/T²) / G
M = (4π²)(1.08e+11/1.95e+7) / (6.67e-11)
=3.27e+15
but the mass of the sun is 1.98e+30.
Check your calculations. I get 1.92*10^30 kg.
 
  • #3
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  • #4
93
0
Check your orbital period. Make sure you convert the year into seconds and then square it.
 
  • #5
ok scratch the last post, i got it, thank you for your help both of you!
much appreciated =)
 

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