Astronomy calculators
Orbital mechanics, gravity and scale calculations for space and observation questions.
Light Year Converter
Calculate light year converter using labeled inputs and a transparent method.
Astronomical Unit Converter
Calculate astronomical unit converter using labeled inputs and a transparent method.
Parsec Converter
Calculate parsec converter using labeled inputs and a transparent method.
Kepler Third Law
Estimate orbital period in years from semi-major axis and central mass using Kepler’s third law.
Orbital Period
Calculate the circular orbital period around a central mass using Newtonian gravity.
Escape Velocity
Calculate the speed needed to escape a spherical body’s gravity without further propulsion.
Schwarzschild Radius
Calculate the Schwarzschild radius for a non-rotating, uncharged mass.
Luminosity Flux
Calculate luminosity flux using labeled inputs and a transparent method.
Distance Modulus
Calculate distance modulus using labeled inputs and a transparent method.
Telescope Magnification
Calculate telescope magnification using labeled inputs and a transparent method.
Telescope Focal Ratio
Calculate telescope focal ratio using labeled inputs and a transparent method.
Star Temperature
Calculate star temperature using labeled inputs and a transparent method.
Angular Size
Calculate angular size using labeled inputs and a transparent method.
Redshift
Calculate redshift using labeled inputs and a transparent method.
Solar Mass
Calculate solar mass using labeled inputs and a transparent method.
Moon Phase Day
Calculate moon phase day using labeled inputs and a transparent method.
Orbit Velocity
Calculate orbit velocity using labeled inputs and a transparent method.
Light Travel Time
Calculate light travel time using labeled inputs and a transparent method.