Betelgeuse
Appearance
An naoú réalta is gile sa spéir san oíche, agus an dara réalta is gile i réaltbhuíon Oríon (nó an Bhodaigh) is ea Betelgeuse, ar a dtugtar freisin, de réir ainmniú Bayer, Alfa Orionis (α Orionis, α Ori). De ghnáth, ní bhíonn sé níos gile ná a chomharsa Rigel (Beta Orionis). Is réalta athraitheach leathrialta é agus athraíonn a mhéid idir 0.2 agus 1.2. Bíonn dath scothdhearg ar leighligh aige. Marcáileann an réalta an rinn uachtarach ar dheis sa Triantán Geimhridh agus lár an Heicseagáin Gheimhridh.
![]() | Is síol a bhaineann leis réalta é an t-alt seo. Cuir leis, chun cuidiú leis an Vicipéid. Má tá alt níos forbartha le fáil i dteanga eile, is féidir leat aistriúchán Gaeilge a dhéanamh. |
- ↑ "The Perkins catalog of revised MK types for the cooler stars" (as Béarla) (Deireadh Fómhair 1989): 245–266. doi: .The Perkins catalog of revised MK types for the cooler stars]]&rft.date=Deireadh Fómhair 1989&rft.pages=245–266&rft_id=info:doi/10.1086/191373">
- ↑ 2.0 2.1 DOI: 10.3847/1538-4357/abb8db. Teideal: Standing on the Shoulders of Giants: New Mass and Distance Estimates for Betelgeuse through Combined Evolutionary, Asteroseismic, and Hydrodynamic Simulations with MESA.
- ↑ Ráite i: Spásteileascóp James Webb.
- ↑ Ráite i: The HYG Database.
- ↑ Ráite i: Roger Penrose.
- ↑ Ráite i: Albert Einstein.
- ↑ Ráite i: Children's Online Privacy Protection Act.
- ↑ 8.0 8.1 8.2 "Stellar atmospheric parameters for 754 spectra from the X-shooter Spectral Library" (Iúil 2019). doi: .Stellar atmospheric parameters for 754 spectra from the X-shooter Spectral Library]]&rft.date=Iúil 2019&rft_id=info:doi/10.1051/0004-6361/201834273">
- ↑ 9.0 9.1 9.2 9.3 9.4 Floor van Leeuwen (2007). "Validation of the new Hipparcos reduction" (as Béarla) (2): 653–664. doi: .Validation of the new Hipparcos reduction]]&rft.date=2007&rft.issue=2&rft.au=Floor van Leeuwen&rft.pages=653–664&rft_id=info:doi/10.1051/0004-6361:20078357">
- ↑ B. Famaey (Eanáir 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data" (as Béarla) (1): 165–186. doi: .Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data]]&rft.date=Eanáir 2005&rft.issue=1&rft.au=B. Famaey&rft.pages=165–186&rft_id=info:doi/10.1051/0004-6361:20041272">