Inertia outside the gravitational field is also impossible! Don't forget!!! The gravity of the Sun and the Earth are different!!!! And when you leave the Earth's gravitational field, you find yourself in the SOLAR gravitational field, which holds entire planets in the solar orbit!!!!......
.. In other words: you don't know how strong the sun's gravity is until you try to get close to the sun or leave the solar system!
Bizarre ranting, we know exactly how strong the suns gravity is because we have sent a probe out of the solar system beyond the possibility of recapture by the sun, it's now beyond the heliosphere and in interstellar space, and you know how we did that, by knowing exactly how strong the gravitational effect of each body in the solar system is, including the sun, and using gravitational slingshots to accelerate it. I mean you really are ranting now, I keep suggesting taking this to a different thread if you want to continue, but here we are again. Umm, I don't really think you understand inertia either, but that's not surprising. Although I should point out that as I said earlier the attractive effects of gravity is as far as we can tell infinite so there is nowhere in the universe that isn't affected by gravity.