A straightest-possible line in a surface or a more general space. In the plane, the geodesics are straight lines, on the surface of a sphere they are great circles.
What is Einstein Online?
Einstein Online is a web portal with comprehensible information on Einstein's theories of relativity and their most exciting applications from the smallest particles to cosmology.
Einstein Online is provided by the
Max Planck Institute for Gravitational Physics(Albert-Einstein-Institut)
About Einstein Online
Includes information on our authors and contributing Institutions, and a brief history of the website.
More than 400 entries from "absolute zero" to "XMM Newton" - whenever you see this type of link on an Einstein Online page, it'll take you to an entry in our relativistic dictionary.
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Links & Literatur
Our recommendations for books and websites on relativity and its history.
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