The twins of the stellar world are binary star systems.A binary star is a star system consisting of two stars orbiting around their common center of mass.When two stars appear close together in the sky, the situation is known as an “optical double”. This means that although the stars are aligned along the same line of sight, they may be at completely different distances from us. This occurs in constellations; however, two stars in the same constellation can also be part of a binary system.
Artist’s impression of the sight from a (hypothetical) moon of planet HD 188753 Ab (upper left), which orbits a triple star system( yes, a Triple Star system!). The brightest companion is just below the horizon.
Binary star systems are very important in astrophysics because calculations of their orbits allow the masses of their component stars to be directly determined, which in turn allows other stellar parameters, such as radius and density, to be indirectly estimated. This also determines an empirical mass-luminosity relationship (MLR) from which the masses of single stars can be estimated.
It is estimated that approximately 1/3 of the star systems in the Milky Way are binary or multiple, with the remaining 2/3 consisting of single stars.
The Brightest star in the sky is a binary.
This is true. When it was discovered in 1844 by the German astronomer Bessel, the system was classed as an astrometric binary, because the companion star, Sirius B, was too faint to be seen. Bessel, who was also a mathematician, determined by calculations that Sirius B existed after observing that the proper of Sirius A (the main star) followed a wavy path in the sky, rather than a uniform path. Sirius can now be studied as a visual binary because, with improving technology and therefore improved telescopes, Sirius B was able to be seen, although not for 20 years after Bessel had correctly predicted its existence.
Black Holes in a binary System ?
The term “binary system” is not used exclusively for star systems, but also for planets, asteroids, and galaxies which rotate around a common center of gravity. However, this is not a trick question; even in star binaries, the companion can be a black hole. An example of this is Cygnus X-1.
Marshall Lefferts - Circle of Fifths, “Cosmometry of Music”.
Cosmometry is the study and application of the fundamental patterns, structures, processes and principles that are at the foundation of all manifestation in the Universe, both Physical and Metaphysical. In its Essence, Cosmometry is about Energy and Consciousness - Energy being that which everything Physical is comprised (vibration, radiation, mass, angular momentum, etc) and consciousness being that which everything Metaphysical is comprised (awareness, emotion, mind, intuition, spirit, etc).
This diagram shows musical system known as the Circle of Fifths, which forms specific Geometries. Simply, it’s the interval between the first and fifth notes of a major scale. For example, in the key of A the fifth note is E (A=1, B=2, C#=3, D=4, E=5, etc). This interval is so primary and profound in Music it is actually called the “Perfect Fifth.” In the world of classical Music theory, one of the ways to show fundamental relationships is to array the 12 notes around a circle following a sequence of fifths, as in the diagram. This shows that there is a progression in Music that naturally moves or cycles through all 12 keys in a way that is harmonically pleasing to our senses.
All Matter is a Vibration in the structure of Space-Time and the study of the structure of Space is called Geometry, therefore Music and Matter itself is Geometry in Motion.
Seven metals are associated with the seven classical planets, and seven deities, all figuring heavily in alchemical symbolism. Although the metals occasionally have a glyph of their own, the planet’s symbol is used most often, and the symbolic and mythological septenary is consistent with Western astrology. The planetary symbolism is limited to the seven wandering stars visible to the naked eye, and the extra-Saturnarian planets such as Neptune are not used.
Gold dominated by Sol ☉ ☼ Silver dominated by Luna ☽ Copper dominated by Venus ♀ Iron dominated by Mars ♂ Tin dominated by Jupiter ♃ Mercury (quicksilver) dominated by Mercury ☿ Lead dominated by Saturn ♄