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RelativityWorks
2010-Dec-21, 02:14 AM
How do I calculate the gravitational attraction between a planet and its parent star if I have the radius in astronomical units and the mass in earth mass and solar mass.

star: http://en.wikipedia.org/wiki/PSR_B1257%2B12

planet: http://en.wikipedia.org/wiki/PSR_B1257%2B12_C

Thanks for the help!

tusenfem
2010-Dec-21, 08:43 AM
I think you might want to look up Newton and the familiar equation for the gravitational force.
Then you might look at the units that you have and convert them to SI units.