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The **Astronomy Calculator Suite** includes functions that are useful for studying astronomy and include the following:

- Kepler's 3
^{rd}Law formula T² = (4π • R³)/(G • M) - Small Angle Formula
*Small Angle Formula**α = S / D* - Flux and Magnitude formulas
- Telescope formulas
- Mass formulas
**Mass from Luminosity****Mass from Acceleration and Radius****Mass from Speed and Separation****Mass of extra-solar planet from mass of star, radius of star orbit and radius of exoplanet orbit****Mass of extra-solar planet from mass and velocity of star and velocity of planet****Black Hole Mass Calculator****Black Hole Event Horizon Calculator**

- Relative Size Formulas
- Wavelength Formulas
- Other Formulas
**Distance from absolute and apparent magnitude****Radius from Speed and Period****Speed of Circular Motion****Hubble Time****Galaxy Recession Velocity****Luminosity from Mass****Hubble's Law****Exoplanet Calculator****Orbital Radial Acceleration****Distance to Barycenter****Sakuma-Hattori Equation****Astronomical Distance Calculator**provides the distance from the Earth to numerous astronomical bodies (e.g. Sun, Moon, planets, stars, Milky Way's Center and Edge, Andromeda Galaxy)**Astronomical Distance Travel Time Calculator**computes the time to travel to distant parts of space at different velocities.**3D Vector Calculator****Drake Equation Calculator****Seager Equation Calculator****Friedman Equation Calculator****Lagrange Points L1 and L2****Schwarzschild Radius****Hill Sphere Radius****Escape Velocity**