By Newton's law gravitation: $F=G\frac{m_1 m_2}{r^2}$ where $m_1$ is my mass, and $m_2$ is the mass of the celestial body, and $r$ is the distance between the center of the body and me Using $G=6.674×10^{-11}\frac{Nm^2}{kg^2}$ For me and Earth: $m_1=70kg$ $m_earth=5.972×10^{24}kg$ $r_earth=6.371×10^6m (assuming that I'm at sea level) and calculating$F_earth\approx 686N$(this is equeal to my weight!,$mg=70kg×9.8\frac{m}{s^2}$) For me and the Moon:$m_Moon=7.342×10^22kg$Average Earth–Moon distance: r=3.844×10^8m and calculating$F_Moon\approx 2.4×10^{-3}N$For me and the Sun:$m_Sun=1.989×10^{30}kg$Average Earth–Sun distance: r=1.496×10^{11}m and calculating$F_Sun\approx 0.414N