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Over the last month or two, there has been a lot of press coverage of the new James Webb Space Telescope, and quite a lot of that coverage has mentioned the fact that the telescope is going to "sit at a Lagrange point". Dillon Mayhew talks us through this mathematical concept.
A contour plot of the effective potential of a two-body system. (the Sun and Earth here), showing the 5 Lagrangian points.
Photo: Lagrange_points.jpg: created by NASAderivative work: Xander89, CC BY 3.0