Estimate the number of intelligent civilizations in the Milky Way galaxy

Estimate the properties of a fly wheel for storing power

Estimate the habitable zone of a star

Esimate the energy, mass, crew, and volume requirements for a habitat

Calculate the delta v required for a Hohmann transfer

Calculate the Lagrange points for a two body system

Calculate the length, acceleration, and power requirements for a mass driver

Estimate the nutrition requirements for a crew

Create an O'Neill Cylinder and estimate the area, mass, population and energy requirements

Visualize the orbit of a satellite

Calculate the delta v required for a mission

Calculate the forces and properties of a rotating space habitat

Estimate the available power from a solar panel anywhere in the solar system

Create a space elevator and estimate the mass, length, and time requirements

Calculate the time and energy required to travel between stars.