POPIII-Like Stellar Populations In The Most Luminous LYMAN-α Emitters At The Epoch Of Re-Ionisation: Spectroscopic Confirmation". The Astrophysical Journal
شابک ۹۷۸-۰۰۰۷۱۶۲۲۱۵. C. Sivaram (۱۹۸۶). «Evolution of the Universe through the Planck epoch». Astrophysics and Space Science. ۱۲۵ (۱): ۱۸۹–۹۹. doi:10.1007/BF00643984
are the instantaneous osculating values at the precise مبدأ (ستارهشناسی) epoch. Barycenter quantities are given because, in contrast to the planetary centre
Millour, F; Mohamed, S; Sanchez-Bermudez, J (28 September 2017). "Multi-epoch VLTI-PIONIER imaging of the supergiant V766 Cen: Image of the close companion