An astronomical constant is any of several physical constants used in astronomy. Formal sets of constants, along with recommended values, have been defined...

ephemerides. It stated that "the astronomical unit of length is that length (A) for which the Gaussian gravitational constant (k) takes the value 0.01720209895...

The astronomical system of units, formerly called the IAU (1976) System of Astronomical Constants, is a system of measurement developed for use in astronomy...

International Astronomical Union at its 16th General Assembly in Grenoble in 1976, accepted Resolution No. 1 regarding a "New System of Astronomical Constants" recommended...

of the constants were incorporated into a great quantity of astronomical research. Because of this, it became difficult to separate the constants from the...

involved are much bigger.[citation needed] Astronomical system of units Planetary mass "Astrodynamic Constants". NASA/JPL. 27 February 2009. Retrieved 27...

Both of these values are included in the IAU (1976) System of Astronomical Constants, used since 1984. From this, the following conversions can be derived:...

some exceptions such as the Sun and Earth symbols appearing in astronomical constants, and certain zodiacal signs used to represent the solstices and...

The gravitational constant is an empirical physical constant involved in the calculation of gravitational effects in Sir Isaac Newton's law of universal...

motion of astronomical objects due solely to this expansion is known as the Hubble flow. It is described by the equation v = H0D, with H0 the constant of proportionality—the...

The solar constant (GSC) measures the amount of energy received by a given area one astronomical unit away from the Sun. More specifically, it is a flux...

the cosmological constant (usually denoted by the Greek capital letter lambda: Λ), alternatively called Einstein's cosmological constant, is a coefficient...

International Astronomical Union in 2009 (see 2016 "Selected Astronomical Constants" Archived 15 February 2016 at the Wayback Machine in "The Astronomical Almanac...

The Planck constant, or Planck's constant, denoted by h {\textstyle h} , is a fundamental physical constant of foundational importance in quantum mechanics:...

using an epoch). Alternatively, the time-varying astronomical quantity can be expressed as a constant, equal to the measure that it had at the epoch, leaving...

the year, the distance from Earth to the Sun (an astronomical unit or AU), and the gravitational constant (G), the mass of the Sun is given by solving Kepler's...

editions. Section K TABLES AND DATA: includes Julian dates, selected astronomical constants, relations between time scales, coordinates of the celestial pole...

of the mass of a planet-like astronomical object. Within the Solar System, planets are usually measured in the astronomical system of units, where the unit...

fine-structure constant, also known as the Sommerfeld constant, commonly denoted by α (the Greek letter alpha), is a fundamental physical constant that quantifies...

In astronomy, seeing is the degradation of the image of an astronomical object due to turbulence in the atmosphere of Earth that may become visible as...

or approximately 93 million miles). In 2012, the IAU defined the astronomical constant to be an exact length in meters: 149,597,870,700 m. Stars condense...

large distances to astronomical objects outside the Solar System, approximately equal to 3.26 light-years or 206,265 astronomical units (AU), i.e. 30...

Supplement to the Astronomical Almanac. University Science Books, Mill Valley, CA. p. 12. ISBN 0-935702-68-7. "Selected Astronomical Constants, 2015 (PDF)"...

the trajectory of an astronomical object). In practice it has been used more specifically to refer to: a former standard astronomical time scale adopted...

A physical constant, sometimes fundamental physical constant or universal constant, is a physical quantity that cannot be explained by a theory and therefore...

Assembly of International Astronomical Union as Current Best Estimates as the IAU (2009) System of Astronomical Constants. Pitjeva is a member of the...

Description of basic astronomical elements and procedures Sidhhantadarpana : A short work in 32 slokas enunciating the astronomical constants with reference...

telescopes, the measuring of positions (and the deriving of orbits and astronomical constants) was the major work of observatories. Fixing a telescope to move...

is usually quoted as "light-time for unit distance" in tables of astronomical constants, and its currently accepted value is 499.004786385(20) s. The mean...

kg ± 6×1020 kg. "2016 Selected Astronomical Constants Archived 2016-02-15 at the Wayback Machine" in The Astronomical Almanac Online (PDF), USNO–UKHO...