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  2. List of brightest stars - Wikipedia

    en.wikipedia.org/wiki/List_of_brightest_stars

    The Sun is the brightest star as viewed from Earth, at −26.78 mag. The second brightest is Sirius at −1.46 mag. For comparison, the brightest non-stellar objects in the Solar System have maximum brightnesses of: the Moon −12.7 mag [1] Venus −4.92 mag; Jupiter −2.94 mag; Mars −2.94 mag; Mercury −2.48 mag; Saturn −0.55 mag [2]

  3. Historical brightest stars - Wikipedia

    en.wikipedia.org/wiki/Historical_brightest_stars

    Sirius is currently the brightest star in Earth's night sky, but it has not always been so. Canopus has persistently been the brightest star over the ages; other stars appear brighter only during relatively temporary periods, during which they are passing the Solar System at a much closer distance than Canopus.

  4. GRB 221009A - Wikipedia

    en.wikipedia.org/wiki/GRB_221009A

    GRB 221009A was an extraordinarily bright and very energetic gamma-ray burst (GRB) jointly discovered by the Neil Gehrels Swift Observatory and the Fermi Gamma-ray Space Telescope on October 9, 2022. The gamma-ray burst was ten minutes long, [1] but was detectable for more than ten hours following initial detection.

  5. Libra (constellation) - Wikipedia

    en.wikipedia.org/wiki/Libra_(constellation)

    Alpha Librae, called Zubenelgenubi, is a multiple star system divisible into two stars when seen through binoculars, The primary (Alpha 2 Librae) is a blue-white star of magnitude 2.7 and the secondary (Alpha 1 Librae) is a white star of magnitude 5.2 and spectral type F3V that is 74.9 ± 0.7 light-years from Earth. Its traditional name means ...

  6. Canis Major - Wikipedia

    en.wikipedia.org/wiki/Canis_Major

    At magnitude 1.5, it is the second-brightest star in Canis Major and the 23rd-brightest star in the sky. It is a blue-white supergiant of spectral type B2Iab, around 404 light-years from Earth. [39] This star is one of the brightest known extreme ultraviolet sources in the sky. [40] It is a binary star; the secondary is of magnitude 7.4.

  7. Sirius - Wikipedia

    en.wikipedia.org/wiki/Sirius

    The season following the star's reappearance ... With an apparent magnitude of −1.46, Sirius is the brightest star in ... At the time of the introduction of the ...

  8. Bright Star Catalogue - Wikipedia

    en.wikipedia.org/wiki/Bright_Star_Catalogue

    The catalog lists 9,110 objects, of which 9,095 are stars, 11 are novae or supernovae (which were "bright stars" only at the time when they were at their peak), [1] and four are non-stellar objects which are the globular clusters 47 Tucanae (designated HR 95) and NGC 2808 (HR 3671), and the open clusters NGC 2281 (HR 2496) and Messier 67 (HR ...

  9. Ursa Major - Wikipedia

    en.wikipedia.org/wiki/Ursa_Major

    Alioth is the brightest star of Ursa Major and the 33rd-brightest in the sky, with a magnitude of 1.76. It is also the brightest of the chemically peculiar Ap stars, magnetic stars whose chemical elements are either depleted or enhanced, and appear to change as the star rotates. [10] Mizar, ζ Ursae Majoris, the second star in from the end of ...

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