The solar mass is a standard way to express mass in astronomy, used to describe the masses of other stars and galaxies. Mass is a fundamental concept in Physics, roughly corresponding to the Intuitive idea of how much Matter there is in an object Astronomy (from the Greek words astron (ἄστρον "star" and nomos (νόμος "law" is the scientific study A star is a massive luminous ball of plasma. The nearest star to Earth is the Sun, which is the source of most of the Energy on Earth A galaxy is a massive gravitationally bound system consisting of Stars an Interstellar medium of gas and dust, and Dark matter It is equal to the mass of the Sun, about two nonillion kilograms or about 332,950 times the mass of the Earth. The Sun (Sol is the Star at the center of the Solar System. Names of numbers larger than a quadrillion are almost never used for reasons discussed further below EARTH was a short-lived Japanese vocal trio which released 6 singles and 1 album between 2000 and 2001 Its conventional symbol and value are:
The solar mass can be determined from the length of the year, the distance of the Earth to the Sun (the astronomical unit) (AU), and the gravitational constant (G) as
. The astronomical unit ( AU or au or au or sometimes ua) is a unit of Length based on the distance from the Earth to the The gravitational constant, denoted G, is a Physical constant involved in the calculation of the gravitational attraction between objects with mass
Until recently, neither the AU nor the gravitational constant was precisely known. However, a determination of the relative mass of another planet in the Solar System or of a binary star in units of solar masses does not depend on these poorly known constants. The Solar System consists of the Sun and those celestial objects bound to it by Gravity. A binary star is a Star system consisting of two Stars orbiting around their Center of mass. So it was useful to express these masses in units of solar masses (see Gaussian gravitational constant). Carl Friedrich Gauss expressed the Gravitational constant in units of the Solar system rather than SI units Today, the AU is extremely well measured using interplanetary radar and G is well measured, but the solar mass persists as one of astronomy's arcane historical conventions. A convention is a set of agreed, stipulated or generally accepted Standards norms social norms or criteria, often taking the form of
Solar mass and related units
One Solar mass can be converted to related units:
- 27 068 510 Lunar mass (ML)
- 332 946 Earth mass (M⊕)
- 1047. Lunar mass (ML is the unit of Mass equal to that of the Moon. Earth mass (M⊕ is the unit of Mass equal to one Earth. 1 M⊕ = 5 56 Jupiter mass (MJ)
It is also common in general relativity to express mass in units of length. Jupiter mass is the unit of Mass equal to one Jupiter (18986 × 1027 kg, 317 General relativity or the general theory of relativity is the geometric theory of Gravitation published by Albert Einstein in 1916
See also
References and further reading
- I. The Chandrasekhar limit limits the mass of bodies made from Electron-degenerate matter, a dense form of matter which consists of nuclei immersed in a gas of Electrons Carl Friedrich Gauss expressed the Gravitational constant in units of the Solar system rather than SI units To help compare different orders of magnitude, the following list describes various Mass levels between 10&minus36&thinsp kg and 1053&thinspkg The Sun (Sol is the Star at the center of the Solar System. -J. Sackmann, A. I. Boothroyd (2003). "Our Sun. V. A Bright Young Sun Consistent with Helioseismology and Warm Temperatures on Ancient Earth and Mars". The Astrophysical Journal 583 (2): 1024-1039.
Dapyx Software network: MP3 Explorer | Ebook Manager | Zenithic