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Astronomy is the scientific study of matter and objects  (such as stars, galaxies, planets, moons, asteroids, comets and nebulae), outside the earth's atmosphere and of their physical and chemical properties .

Sub-fields of astronomy include: Solar astronomy, Planetary science, Stellar astronomy, Galactic astronomy, Extragalactic astronomy, and Cosmology.

vCalc's Astronomy library contains equations and constants used to study these celestial objects.

Parent Categories:


Astronomy Calculators

Astronomy Collections

Astronomy Equations

  • Astro Distances by vCalc
  • Astro Travel Time by vCalc
  • barycenter distance (r1) by vCalc
  • Full Impulse Speed by vCalc
  • lux - to - vMag by vCalc
  • Speed of Circular Motion by vCalc
  • Sphere - Volume by vCalc
  • Sphere - Volume from Circumference by vCalc
  • vMag - to - lux by vCalc
  • Absorbance by MichaelBartmess
  • Age of Universe (estimated) by MichaelBartmess
  • Albedo (absolute magnitude and diameter) by EmilyB
  • Drake Equation (original) by MichaelBartmess
  • Gregorian Calendar to Julian Day Number (JDN) by MichaelBartmess
  • K3L-Mass from Period and Separation by sspickle
  • K3L-Period from Mass and Separation by sspickle
  • K3L-Separation from Mass and Period by sspickle
  • Mass from Acceleration and Radius by sspickle
  • mass of extra-solar planet from M, r and R by sspickle
  • mass of extra-solar-planet from M, v and V by sspickle
  • Modified Julian Day (MJD) by MichaelBartmess
  • `sqrt( (G*M)/R )` by Carol
  • Reduced Julian Day (RJD) by MichaelBartmess
  • Schwarzchild Radius by MichaelBartmess
  • Seager Equation by EmilyB
  • speed from delta lambda and lambda by sspickle
  • Truncated Julian Day (TJD) by MichaelBartmess
  • Unix Time (seconds) by MichaelBartmess
  • Warp Speed by KurtHeckman
  • What's Your Dog's Sign? by MichaelBartmess
  • What's Your Sign? by MichaelBartmess

Astronomy Constants