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  2. Algol - Wikipedia

    en.wikipedia.org/wiki/Algol

    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 ...

  3. List of nearest stars - Wikipedia

    en.wikipedia.org/wiki/List_of_nearest_stars

    The closest encounter to the Sun so far predicted is the low-mass orange dwarf star Gliese 710 / HIP 89825 with roughly 60% the mass of the Sun. [4] It is currently predicted to pass 0.1696 ± 0.0065 ly (10 635 ± 500 au) from the Sun in 1.290 ± 0.04 million years from the present, close enough to significantly disturb the Solar System's Oort ...

  4. List of nearest stars by spectral type - Wikipedia

    en.wikipedia.org/wiki/List_of_nearest_stars_by...

    Distance Spectral type ... Also the 20th brightest star in the night sky. Algol Aa1 90 ... Zeta Ophiuchi is the closest O-type star to the Earth. Name Distance

  5. Alpha Persei - Wikipedia

    en.wikipedia.org/wiki/Alpha_Persei

    Distance: 510 ± 10 ly (155 ± ... outshining the constellation's best-known star, Algol (β ... HinaliÊ»i is the point of separation between the Earth and the sky ...

  6. Looking Up: These nights are best for seeing star Algol ...

    www.aol.com/looking-nights-best-seeing-star...

    Looking Up: See the star Algol in the constellation Perseus slowly blink. Plus, enjoy a brilliant Jupiter and catch the Double Cluster full of stars.

  7. Scientists discover Earth-like planet orbiting star closest ...

    www.aol.com/article/news/2016/08/24/scientists...

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  8. Algol variable - Wikipedia

    en.wikipedia.org/wiki/Algol_variable

    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 ...

  9. List of the most distant astronomical objects - Wikipedia

    en.wikipedia.org/wiki/List_of_the_most_distant...

    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 described in Earth radii (20, also inaccurate).