Astronomy Calc

vCalc Reviewed
Calculator / Last modified by AndrewBudd on 2019/08/15 20:19
Kepler's 3rd Law
(M) - Mass from Period and Separation
(T) - Period from Mass and Separation
(R) - Separation from Mass and Period
(G) - Gravitational Constant
(`alpha`) Angle from size and distance
(s) Size from Distance and angle
(D) Distance from Size and Angle
Difference in magnitudes from Flux Ratio
Flux Ratio from Magnitudes
Resolving Power of a Telescope
Magnification of a Telescope
Mass from Luminosity
Mass from Acceleration and Radius
Mass from Speed and Separation
mass of extra-solar planet from M, r and R
mass of extra-solar-planet from M, v and V
Relative Size from Relative Temperature and Luminosity
Relative Temperature from Relative size and luminosity
Relative Luminosity from relative size and temperature
speed from delta lambda and lambda
Wavelength shift from speed and wavelength
Blackbody wavelength from Temperature
Blackbody Temperature from peak wavelength
Photon Energy from Wavelength
Photon Wavelength from Energy
Distance from absolute and apparent magnitude
radius from speed and period
Speed of Circular Motion
Hubble Time
Luminosity from Mass
Mass from Luminosity

The Astronomy Calculator includes functions that are useful for studying astronomy. Formulae are organized in different tabs to the right as follows: T2 = (4π • R3)/(G•M)
          Kepler's Third Law

Astronomy Calculators

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Astronomy Calculator's Creator

SSpicklemire.jpg  Special thanks to Dr. Stephen Spicklemire, Department Chair, Physics &Earth-Space Science, Associate Professor of Physics at the University of Indianapolis.  Dr. Spicklemire created this calculator and all of the underlying equations (functions) to help his astronomy students.  

"vCalc is awesome for my astronomy students. With vCalc I can give them real problems that would normally require fairly sophisticated reasoning and mathematics, and now they can do the reasoning, because they’re not daunted by the math. It’s great."   Dr. Steve Spicklemire