This program allows you to apply astronomical formulas to all nine of the planets in our Solar System at the same time.

In the space provided enter equations using the constants and planetary
variables in the two tables below or you can select an equation from the menu. **Remember the box must be empty if you are using the menu.**

Once you hit submit, your answers will be displayed in MKS units (meters, kilograms, and seconds) and degrees, unless you multiply them by one of the unit changing variables like "m2AU" which converts meters to AU.

Sample Equations:

For Escape Velocity enter: sqrt(2*G*M/R)

To change Spin Period from seconds to hours enter: Ps*s2hr

Planet Mass: The Mass of a planet is the
total amount of matter contained in the planet. The units of mass
are kilograms. | |

Planet Radius: The Radius of a planet is
the distance from its center to its edge. The radius is given in
units of meters. | |

Planet Density: The Density of a planet is
the ratio of a planet's mass to its volume. The units of density
are kilograms per meters cubed. | |

Planet Oblateness: The Oblateness of a
planet is how much is has been flattened by its rotation. Oblateness is
unitless. | |

Spin Period: The Spin Period is the time
that it takes the planet to spin once on its axis. The Spin Period is
given in units of seconds. | |

Surface Gravity: The Surface Gravity is
the acceleration due to gravity on the surface of the planet. The units
of surface gravity are meters per seconds squared. | |

Escape Velocity: The Escape Velocity is the
velocity a body needs to escape the gravity of the planet and get out into
space. The units of escape velocity are meters per
second. | |

Synchronous Orbit: The Synchronous Orbit
is the distance from the planet where the Kepler period of the orbitting
body equals the spin period of the planet. The units of the Synchronous
Orbit are meters. | |

Planet Tilt: The Tilt of a planet is the
axial tilt with respect to the orbital plane. The units of tilt are
degrees. | |

Semimajor Axis: The Semimajor Axis is the
longest diameter of the orbital ellipse. The units of semimajor axis are
meters. | |

Orbit Eccentricity: The Eccentricity is
how elliptical an orbit is. Eccentricity is unitless. | |

Orbit Inclination: The Inclination is how
much a planet's orbit is tilted with respect to the Earth's orbital plane.
The units of inclination are degrees. | |

Orbital Velocity: The Orbital Velocity of
a planet is how fast it orbits the Sun. The units of orbital velocity are
meters per second. | |

Orbital Period: The Orbital Period is the
time it takes for a planet to go once around the sun. The orbital period
is given in seconds. | |

Hill Radius: The Hill Radius is the
distance within which satellites around a planet will have stable orbits.
The units of the Hill radius are meters. |

** Planet Mean Motion: n**

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