| The speed an atom needs to escape the planet, where m is the mass of the atom. |

| The speed of a typical atom, where m is the mass of the atom. |

| The the speed an atom needs to escape the planet, where m is the mass planet. |

| The speed of a typical atom, where m is the mass of the planet. |

| The speed an atom needs to orbit the planet, where m is the mass of the atom. |