Celestial Spheres by Austin M. Freeman

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Strings on celestial sphere by Stephan Stieberger, Tomasz R. Taylor

“…We transform superstring scattering amplitudes into the correlation functions of primary conformal fields on two-dimensional celestial sphere. The points on celestial sphere are associated to the asymptotic directions of (light-like) momenta of external particles, with the Lorentz group realized as the SL(2,C) conformal symmetry of the sphere. …”
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Eikonal amplitudes on the celestial sphere by Tim Adamo, Wei Bu, Piotr Tourkine, Bin Zhu

“…Abstract Celestial scattering amplitudes for massless particles are Mellin transforms of momentum-space scattering amplitudes with respect to the energies of the external particles, and behave as conformal correlators on the celestial sphere. However, there are few explicit cases of well-defined celestial amplitudes, particularly for gravitational theories: the mixing between low- and high-energy scales induced by the Mellin transform generically yields divergent integrals. …”
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p-forms on the celestial sphere by Laura Donnay, Erfan Esmaeili, Carlo Heissenberg

“…We then provide a systematic technique to obtain the large-$r$ asymptotic limit near $\mathscr I$ based on the method of regions, which naturally takes into account the presence of both ordinary and contact terms on the celestial sphere. In $D=4$, this allows us to reformulate in a conformal primary language the links between scalars and dual two-forms.…”
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On Sugawara construction on celestial sphere by Wei Fan, Angelos Fotopoulos, Stephan Stieberger, Tomasz R. Taylor

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Optic arrays and celestial spheres by Rogers, B

The amateur astronomer's introduction to the celestial sphere / by 447111 Millar, William

Subjects: “…Celestial sphere…”

The 'uncurved lines' on Helmholtz's 'celestial sphere' by Rogers, B

Tree-level gluon amplitudes on the celestial sphere by Anders Ø. Schreiber, Anastasia Volovich, Michael Zlotnikov

“…Pasterski, Shao and Strominger have recently proposed that massless scattering amplitudes can be mapped to correlators on the celestial sphere at infinity via a Mellin transform. We apply this prescription to arbitrary n-point tree-level gluon amplitudes. …”
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Helmholtz's celestial sphere and the perception of straight lines by Rogers, B

Goldstone bosons on celestial sphere and conformal soft theorems by Karol Kampf, Jiří Novotný, Jaroslav Trnka, Petr Vaško

“…Motivated by the success of soft bootstrap in momentum space and the important role of the soft limit behavior of tree-level amplitudes, our goal is to extend some of the methods to the celestial sphere. The crucial ingredient of the calculation is the Mellin transformation, which transforms four-dimensional scattering amplitudes to correlation functions of primary operators in the celestial CFT. …”
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Photon chiral memory effect stored on celestial sphere by Azadeh Maleknejad

“…Abstract This work introduces the chiral memory effect on the celestial sphere that measures the permanent change of electromagnetic fields by spin-dependent processes in bulk. …”
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An infinite family of w 1+∞ invariant theories on the celestial sphere by Shamik Banerjee, Harshal Kulkarni, Partha Paul

“…Abstract In this note we determine the graviton-graviton OPE and the null states in any w 1+∞ symmetric theory on the celestial sphere. Our analysis shows that there exists a discrete infinite family of such theories. …”
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Straight lines, ‘uncurved lines’, and Helmholtz’s ‘great circles on the celestial sphere’ by Rogers, B, Brecher, K

A hidden 2d CFT for self-dual Yang-Mills on the celestial sphere by Wei Bu, Sean Seet

“…Under a projection, it can be mapped to the celestial sphere at the light-cone cut of the origin on I $$ \mathcal{I} $$ . …”
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STEREOGRAPHIC PROJECTION OF THE HEAVENS OVER BELGRADE USED FOR THE CONSTRUCTION OF ASTRONOMICAL CITY CLOCK by Ivana CVETKOVIC, Branislav POPKONSTANTINOVIC, Misa STOJICEVIC, Ratko OBRADOVIC, Rodoljub MILICEVIC

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KONTRIBUSI TEORI IBN AL-SHĀṬIR DALAM PERKEMBANGAN TRADISI ILMIAH ASTRONOMI ISLAM by S Sakirman, Muslich Shabir

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STEREOGRAPHIC PROJECTION OF THE HEAVENS OVER BELGRADE USED FOR THE CONSTRUCTION OF ASTRONOMICAL CITY CLOCK by Ivana Cvetkovic, Branislav Popkonstantinovic, Misa Stojicevic, Ratko Obradovic, Rodoljub Milicevic

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STEREOGRAPHIC PROJECTION OF THE HEAVENS OVER BELGRADE USED FOR THE CONSTRUCTION OF ASTRONOMICAL CITY CLOCK by Ivana Cvetkovic, Branislav Popkonstantinovic, Misa Stojicevic, Ratko Obradovic, Rodoljub Milicevic

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Simulation of Night Sky Images with an Ideal Pinhole Model for a Star Sensor by Amie ali Nikkhah, farsahd somayehee, Jafar Roshanian

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