Definition | Value |

Mass of Earth | m _{E} = 5.98 × 10^{24} Kg |

(mean) Radius of Earth | r _{E} = 6.4 × 10^{6} m |

Mass of Moon | m _{M} = 7.36 × 10^{22} Kg |

(mean) Radius of Moon | r _{M} = 1.74 × 10^{6} m |

Mass of Sun | m _{s} = 1.99 × 10^{30} Kg |

(mean) Radius of Sun | r _{s} = 6.96 × 10^{8} m |

Acceleration due to Earth Gravity (near surface of Earth) | g = 9.8 m/s^{2} |

Speed of Light in Vacuum | c = 3.00 × 10^{8} m/s |

Gravitational Constant (appears in Newton's law of universal gravitation) | G = 6.67 × 10^{-11} N·m^{2} / kg^{2} |

Permeability in Vacuum | μ_{0} = 4π × 10^{-7} T·m / A |

Permittivity in Vacuum | ε_{0} = 8.854 × 10^{-12} F / m |

Coulomb's Constant (in Coulomb's Law) | k = 9.00 × 10^{9} N·m^{2}/C^{2} |

Planck's constant h | h = 6.63 × 10^{-34} J·s |

Elementary Charge e | e = 1.60 × 10^{-19} C |

Mass of Electron | m_{e} = 9.109 × 10^{-31} Kg |

Mass of Proton | m_{p} = 1.673 × 10^{-27} Kg |

Mass of Neutron | m_{n} = 1.675 ×10^{-27} Kg |