Celestial mechanics and astronomy
Discover exoplanets the way researchers do, using the radial velocity, transit and astrometry methods. Compute the stellar…
Calculate the natural frequency, angular frequency and period of a spring-mass system or a beam/cantilever carrying a concentrated…
Design your own UFO: pick a shape and engine, add passengers, and compute maximum velocity, Mach number, g-force and travel…
Calculate the synodic period (time between two identical configurations such as oppositions) from a sidereal period, or work…
Calculate the specific impulse (Isp) of a rocket or jet engine from thrust and mass flow rate, or from exhaust velocity.…
Calculate the Hohmann transfer between two circular orbits: total delta-v, the two burns, transfer time, transfer-orbit geometry,…
Calculate the thrust-to-weight ratio (TWR) of any aircraft, rocket, or drone. Enter thrust in N, kN, MN, lbf, or klbf and…
Calculate the orbital speed and orbital period of any Earth satellite at a given height above sea level. Supports metric…
Calculate the orbital period of any planet, moon, satellite, or binary star system using Kepler's Third Law T = 2π√(a³/GM).…
Calculate spacecraft delta-v using the Tsiolkovsky rocket equation Δv = ve × ln(m0/mf). Enter exhaust velocity or specific…
Calculate orbital velocity, period, apoapsis and periapsis distances for any elliptical orbit using the vis-viva equation.…
Calculate the number of active alien civilizations in the Milky Way using the Drake Equation (N = R* × fp × ne × fl × fi…
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