Astronomy & Space Tools
100% client-side astrophysics, orbital mechanics, telescope optics, cosmic distance converters, Kepler laws, escape velocity, and relativistic travel calculators with zero server data transfer. All tools run 100% in your browser with zero server uploads and instant processing.
Cosmic & Astronomical Distance Converter
Convert kilometers, miles, AU, light-years, parsecs, and gigaparsecs with photon transit times
Light-Year & Interstellar Distance Converter
Convert light-years to AU, km, miles, parsecs, and estimate probe transit times across propulsion drives
Astronomical Unit (AU) Converter & Solar System Scale
Convert AU to km, miles, light-minutes, and compare Solar System planetary orbits
Orbital Period & Satellite Trajectory Calculator
Calculate orbital periods, mean velocities, apoapsis/periapsis speeds, and orbital energy
Escape Velocity & Celestial Launch Energy Calculator
Calculate surface and orbital escape velocity, launch kinetic energy, and Schwarzschild radius
Celestial Surface Gravity & Gravitational Force Calculator
Calculate surface gravity (m/s²), Earth g-forces, Newtonian attraction, and Solar System weight
Kepler's Laws & Vis-Viva Orbital Mechanics Calculator
Solve Kepler's 3 laws of planetary motion, orbital ellipses, periapsis/apoapsis speeds, and areal velocity
Telescope Magnification, Optics & Resolving Power Calculator
Calculate magnification, exit pupil, true field of view, focal ratio, and Dawes' resolving limit
Star Distance, Stellar Parallax & Distance Modulus Converter
Calculate stellar distance from parallax angle, distance modulus (m-M), and cosmological redshift
Cosmic Travel Time & Relativistic Spaceflight Calculator
Calculate spaceflight transit times, Einstein time dilation, and ship vs Earth elapsed time
No tools found matching your filter.
Try selecting another subcategory tab or clearing the search query.