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[1] ξ=ξ0cos⁡ϕ=ξ0cos⁡sa\displaystyle \xi = \xi_0 \cos \phi = \xi_0 \cos \frac{s}{a}ξ=ξ0​cosϕ=ξ0​cosas​[2] 저작자 : WillowW / Wikimedia Commons #[3] 저작자 : WillowW / Wikimedia Commons #[4] Miller-Jones, James C. A.; et al. (18 February 2021). "Cygnus X-1 contains a 21–solar mass black hole—Implications for massive star winds". Science. 371 (6533): 1046–1049. #[5] GRAVITY Collaboration (Abuter, R., et al.) 2018, "Detection of the gravitational redshift in the orbit of the star S2 near the Galactic centre massive black hole", A&A 615, L15 #[6] GRAVITY Collaboration (Abuter, R., et al.) 2020, "Detection of the Schwarzschild precession in the orbit of the star S2 near the Galactic centre massive black hole", A&A 636, L5 #[7] Yuzhu Chi et al. "Precessing jet nozzle connecting to a spinning black hole in M87", Nature volume 621, pages711–715 (2023) #[8] Hulse, R. A. & Taylor, J. H., "Discovery of a pulsar in a binary system", Astrophysical Journal, vol. 195, Jan. 15, 1975, pt. 2, p. L51-L53. #[9] Weisberg, J. M.; Taylor, J. H.; Fowler, L. A. (October 1981). "Gravitational waves from an orbiting pulsar". Scientific American. 245 (4): 74–82.[10] B. P. Abbott et al. (LIGO Scientific Collaboration and Virgo Collaboration), "Observation of Gravitational Waves from a Binary Black Hole Merger", Phys. Rev. Lett. 116, 061102 – Published 11 February 2016 #[11] Abbott BP, et al. (LIGO, Virgo and other collaborations) (October 2017). "Multi-messenger Observations of a Binary Neutron Star Merger". The Astrophysical Journal. 848 (2): L12.[12] 저작자 : Fred the Oyster #[13] Sean M. Carroll (2003), "Spacetime and Geometry: An Introduction to General Relativity", Addison Wesley: 113–120.[14] 저작자 : P. Fraundorf #[15] 저작자 : MikeRun #[16] 각속도 ω\omegaω의 단위는 rad/s\mathrm{rad/s}rad/s[17] 물론 일반물리학 에서도 나오지만, 이론의 특성상 아무 공식도 제시하지 않고 끝낸다. 학부생들이 일반 상대론을 제대로 다루게 되는 것은 아무리 빨라도 학부 4학년부터이며, 보통은 대학원 과정에서 배우게 된다.