IF that's what they're teaching you at school in whatever feudal theocracy it is that you live in--Iraq?-- it's no wonder there are only three Islamic Nobel winners in science from a population of over a billion. The Jews are way ahead of you, fully a quarter of the science Nobel Prizes have been awarded to Jews, from a population of around 15 million. That's the difference between valuing education and reason as Jewish culture does, and the superstition most Islamic societies, and you, are sinking in.
Your school lessons were wrong. I tell you: no, heat is not a factor in gravity. Heat and energy aren't quite the same thing either, by the way. The claim at that link you provided in post #62 about the recent global heat wave is also wrong, the earth has not moved a few miles closer to the sun. The earth's orbit about the sun is an ellipse, not a circle, the earth's distance from the sun varies by about 3 million miles over the course of a year, it's about 92 million miles at closest approach, and about 95 million miles at the farthest point. Every year. All the time. Moving merely a few miles closer, as the text at that link claims, would have no measurable impact on the earth's temperature.
And no, the distance does not correlate with summer and winter, seasons are due to the earth's axial tilt.