Telescope, Star Distance, Moon Phase & Orbit Calculators
Work out telescope magnification and resolving power, star brightness and distance, moon phases, sidereal time, orbital periods, rocket delta-v, and black hole size.
Magnification, exit pupil, and true field of view for a telescope and eyepiece.
How much more light a telescope gathers and the faintest star it can show.
Dawes and Rayleigh resolution limits and the smallest Moon feature visible.
How many times brighter one star is than another from their magnitudes.
Distance to a star from its apparent and absolute magnitude.
Distance to a nearby star from its measured parallax angle.
How large an object appears in the sky from its size and distance.
How long a planet takes to orbit a star from its orbit size.
What you would weigh on the Moon, Mars, Jupiter, and other worlds.
Moon phase, age, and illumination for any date.
Sidereal time at your longitude, the right ascension on your meridian.
Velocity change a rocket can produce from its mass and engine efficiency.
Travel time and velocity change to move between two planetary orbits.
Recession speed and distance of a galaxy from its redshift.
Event horizon size of a black hole from its mass.
About these Astronomy & Space calculators
toolshere.biz.id has 15 free astronomy & space calculators. Work out telescope magnification and resolving power, star brightness and distance, moon phases, sidereal time, orbital periods, rocket delta-v, and black hole size. Popular topics include telescope magnification, star magnitude, moon phase, orbits and rocket delta-v. Every tool runs in your browser, so the numbers you type stay on your device.
Magnification, star brightness and distance, orbits, and the Moon explained with simple formulas. Most tools in this category rely on telescope magnification and exit pupil; the Astronomy & Space calculation guide walks through a worked example step by step.
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