not sure what to do here..(adsbygoogle = window.adsbygoogle || []).push({});

Im being asked to compare the periods of 2 different satellites in orbit around a planet.

the first one is a circular orbit of radius = r

the second one orbits 1r to the left and 3r to the right around the planet.

I'll attempt to draw it here :tongue:

0 is the planet

(---------0---------)------------------------)

<---r----><---r----><---------2r------------>

I understand how the period works in the first circular orbit.. but not the second one. any ideas?

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

Dismiss Notice

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!

# Kepler's third law

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