Dictionary
perihelion
For a planet or other heavenly body orbiting the sun on an elliptic orbit, that point of the orbit closest to the sun. In the context of general relativity, the perihelion is of great interest as that theory predicts a slight motion of this point around the sun, cf. (relativistic) perihelion shift.
Further Articles
Black Holes & Co. / Elementary tour: Conclusion
Relativity and the Quantum / Elementary Tour part 2: Evaporating black holes?- Cosmology / Elementary Tour: Conclusion
General relativity / Elementary Tour part 1: Einstein’s geometric gravity
General relativity / Elementary Tour part 4: The light side of gravity
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