Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

I Why are the planets revolving around their own axis?

  1. Sep 12, 2017 #21
    Derivation of Earth angular momentum around Sun:
    Mass of Earth - 6*1024 kg
    Speed of Earth on orbit - 3*104 m/s
    Lever arm of the speed - 1,5*1011 m
    So angular momentum: 2,7*1040 J*s
    Planck constant: 1,05*10-34 J*s
    Thus the quantum number of Earth orbit - about 2,5*1074, as stated before.
  2. Sep 12, 2017 #22


    User Avatar
    Science Advisor

    This assumes that angular momentum is always quantized. If linear momentum and position are not quantized then there is no reason to expect that angular momentum is quantized. As @andrewkirk pointed out:

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted