astronomy Calculators

Stellar Luminosity Calculator

Calculate the luminosity of a star based on its radius and temperature

Calculate astronomical distances using apparent and absolute magnitude

Calculate the orbital velocity of objects around a central mass

Calculate the event horizon radius of a black hole

Calculate recession velocity from cosmological redshift

Calculate planetary mass using orbital period and semi-major axis

Calculate the minimum velocity needed to escape a celestial body

Calculate stellar distance using parallax measurements

Calculate tidal forces between celestial bodies

Calculate the habitable zone boundaries around a star

Calculate time for light to travel astronomical distances

Calculate brightness ratio between two astronomical objects

Calculate the angular size of celestial objects

Calculate the tidal disruption distance for satellites

Calculate the synodic period between two orbiting bodies

Estimate main sequence lifetime of stars

Calculate comet velocity at closest approach to the Sun

Calculate orbital period around the galactic center

Calculate apparent magnitude from luminosity and distance

Calculate equilibrium temperature of planets