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  2. Betelgeuse - Wikipedia

    en.wikipedia.org/wiki/Betelgeuse

    Betelgeuse became the first extrasolar star whose photosphere's angular size was measured in 1920, and subsequent studies have reported an angular diameter (i.e., apparent size) ranging from 0.042 to 0.056 arcseconds; that range of determinations is ascribed to non-sphericity, limb darkening, pulsations and varying appearance at different ...

  3. The red giant star Betelgeuse is closer than we thought ... - AOL

    www.aol.com/red-giant-star-betelgeuse-closer...

    In addition to new measurements of the star’s size and distance, this new study from Australian National University (ANU) suggests the star is not likely to erupt for 100,000 years. Betelgeuse ...

  4. List of largest stars - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_stars

    −119 [d] or ~R Betelgeuse: L/T eff & AD Widely recognised as being among the largest known stars. [19] Might be the largest star visible to the naked eye. [28] The higher radii estimate assume Mu Cephei is in the Cepheus OB2 OB association. [26] [29] Other sources suggest Mu Cephei and Betelgeuse are likely similar in properties.

  5. Red supergiant - Wikipedia

    en.wikipedia.org/wiki/Red_supergiant

    The Orion region showing the red supergiant Betelgeuse. Red supergiants are rare stars, but they are visible at great distance and are often variable so there are a number of well-known naked-eye examples: Antares A; Betelgeuse; Epsilon Pegasi; Zeta Cephei; Lambda Velorum; Eta Persei; 31 and 32 Cygni; Psi 1 Aurigae; 119 Tauri

  6. Solar radius - Wikipedia

    en.wikipedia.org/wiki/Solar_radius

    Solar radius is a unit of distance used to express the size of stars in astronomy relative to the Sun. ... Betelgeuse: 764 [10] 531,500,000: Antares A 680 [11 ...

  7. An asteroid will temporarily eclipse one of the brightest ...

    www.aol.com/asteroid-block-one-brightest-stars...

    Betelgeuse is a red supergiant star about 700 light-years away that serves as the shoulder in the Orion constellation, according to NASA. Given its intense luminosity, Betelgeuse is what ...

  8. Red giant - Wikipedia

    en.wikipedia.org/wiki/Red_giant

    Despite the lower energy density of their envelope, red giants are many times more luminous than the Sun because of their great size. Red-giant-branch stars have luminosities up to nearly three thousand times that of the Sun ( L ☉ ); spectral types of K or M have surface temperatures of 3,000–4,000 K (compared with the Sun's photosphere ...

  9. 319 Leona - Wikipedia

    en.wikipedia.org/wiki/319_Leona

    The 14th magnitude asteroid was predicted to occult Betelgeuse approximately 12 seconds; Betelgeuse was expected to dim by about 3 magnitudes. [17] The prediction was at first uncertain, visible on a very narrow path on Earth's surface, its width and location being uncertain due to lack of precise knowledge of the size and path of the asteroid ...