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The eclipsing binary pair is separated by only 0.062 astronomical units (au) from each other, whereas the third star in the system (Algol Ab) is at an average distance of 2.69 au from the pair, and the mutual orbital period of the trio is 681 Earth days. The total mass of the system is about 5.8 solar masses, and the mass ratios of Aa1, Aa2 ...
Phase-folded light curve of the Algol variable Zeta Phoenicis recorded by NASA's Transiting Exoplanet Survey Satellite (TESS) Algol variables or Algol-type binaries are a class of eclipsing binary stars that are similar to the prototype member of this class, β Persei (Beta Persei, Algol). An Algol binary is a system where both stars are near ...
This number is likely much higher, due to the sheer number of stars needed to be surveyed; a star approaching the Solar System 10 million years ago, moving at a typical Sun-relative 20–200 kilometers per second, would be 600–6,000 light-years from the Sun at present day, with millions of stars closer to the Sun.
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It had been conjectured that the fixed stars were much farther away than the planets. Sun: Star 3rd century BC — 1609 380 Earth radii (very inaccurate, true=16000 Earth radii) Aristarchus of Samos made a measurement of the distance of the Sun from the Earth in relation to the distance of the Moon from the Earth. The distance to the Moon was ...
The body must orbit its host star, just as Earth and Jupiter orbit the sun. It is large enough to be mostly round. It must have an important influence on the orbital stability of the other objects ...
The first star to have its distance to Earth measured after the Sun. Also the 15th nearest stellar system to our solar system. ... Also the 20th brightest star in the ...