I was wondering about gravity and weight? I apologize if this question seems elementary to you all, so please forgive me as i am not a scientist. If gravity acts equally on all objects regardless of size or mass, (ie. drop a bowling ball or a penny, they both fall at the same speed right?) then why do they have different weights when at rest on the ground? If mass and gravity have nothing to do with one another, then why do larger planets have stronger gravity? Or for that matter, why is the sun's gravitational field so much larger than ours? thnx.