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The Vergina Sun (Greek: Ήλιος της Βεργίνας, romanized: Ilios tis Vergínas, lit. 'Sun of Vergina'), also known as the Star of Vergina, Vergina Star or Argead Star, is a rayed solar symbol first appearing in ancient Greek art of the period between the 6th and 2nd centuries BC. The Vergina Sun proper has sixteen triangular rays ...
A-type star In the Harvard spectral classification system, a class of main-sequence star having spectra dominated by Balmer absorption lines of hydrogen. Stars of spectral class A are typically blue-white or white in color, measure between 1.4 and 2.1 times the mass of the Sun, and have surface temperatures of 7,600–10,000 kelvin.
LMXB – (celestial object) low-mass x-ray binary, an X-ray-luminous binary star system in which one of the stars is a neutron star or black hole that is stripping material away from the other star in the system; LN2 – (instrumentation) liquid nitrogen; LOAN – Longitude of ascending node; LOFAR – (telescope) LOw Frequency ARray, for radio ...
The physical universe is defined as all of space and time [a] (collectively referred to as spacetime) and their contents. [10] Such contents comprise all of energy in its various forms, including electromagnetic radiation and matter, and therefore planets, moons, stars, galaxies, and the contents of intergalactic space.
Astronomy – studies the universe beyond Earth, including its formation and development, and the evolution, physics, chemistry, meteorology, and motion of celestial objects (such as galaxies, planets, etc.) and phenomena that originate outside the atmosphere of Earth (such as the cosmic background radiation).
This may give birth to planets in certain circumstances, which are not well known. Thus the formation of planetary systems is thought to be a natural result of star formation. A Sun-like star usually takes approximately 1 million years to form, with the protoplanetary disk evolving into a planetary system over the next 10–100 million years. [2]
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Spica is the brightest star in the constellation of Virgo (lower left). As one of the nearest massive binary star systems to the Sun, Spica has been the subject of many observational studies. [17] Spica is believed to be the star that gave Hipparchus the data that led him to discover the precession of the equinoxes. [18]