Astronomy Calculators
Explore celestial measurements, planetary motion, and astronomical phenomena. Calculate orbital mechanics, stellar brightness, distances between heavenly bodies, and cosmic time scales for astronomical research and stargazing.
View our calculators
Light Year Distance Calculator
Convert between light-years, parsecs, astronomical units, and conventional measures. Calculate vast cosmic distances for astronomy research, space exploration planning, and understanding the scale of the universe.
Moon Phase Calculator
Calculate current, past, and future moon phases. View daily moon details, monthly moon phases, or find dates for upcoming new and full moons. Track lunar cycles for astronomy, gardening, fishing, or cultural events.
Orbital Period Calculator
Calculate the time it takes for a celestial body to complete one orbit around another, or determine orbital distance from period. Use Kepler's Third Law and Newton's Law of Gravitation for planets, moons, satellites, and binary stars.
Planetary Weight Calculator
Calculate how much you would weigh on different planets, moons, and celestial bodies based on their gravitational fields. Compare your weight across our solar system from Mercury to Pluto.
Star Magnitude Calculator
Calculate apparent magnitude, absolute magnitude, and distance for stars. Convert between different magnitude scales, compare star brightnesses, and determine distances using the cosmic distance modulus.
Stellar Temperature Calculator
Calculate the surface temperature of stars based on their color, spectral class, or luminosity. Understand the relationships between stellar temperature, color, and classification in astrophysics.
Telescope Magnification Calculator
Calculate the magnification of telescopes with different eyepieces. Determine optimal magnification for various astronomical targets, exit pupil size, field of view, and maximum usable magnification based on aperture.