Changes in planet orbits as a star (eg. the Sun) decreases is mass.

mgb_phys

The sun losses about 10^-13 of it's mass/year
This increases the Earth-Sun distance at the same rate.
But since the Earth-Sun distance is 150million km this is only about 1cm/year

mgb_phys Recognitions: Homework Help Science Advisor	The sun losses about 10^-13 of it's mass/year This increases the Earth-Sun distance at the same rate. But since the Earth-Sun distance is 150million km this is only about 1cm/year