Lagrangian Point
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Lagrangian Point
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One of the five solutions by Lagrange to the three-body problem
in which three bodies will move as a stable configuration. In
three of the solutions the bodies are in line; in the other two
the bodies are at the vortices of equilateral triangles.
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Lagrange predicted in 1772 that if the three bodies form
an equilateral triangle revolving about one of the bodies, the
system would be stable. This prediction was fulfilled in 1908
with the discovery of the asteroid Achilles approximately 60
degrees ahead of Jupiter in Jupiter's orbit. Since then other
asteroids have been discovered 60 degrees ahead and 60 degrees
behind Jupiter.
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References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use