Lagrange point

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English[edit]

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Lagrange points (green), primary central object (yellow) and secondary orbitting object (blue)

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Etymology[edit]

60-degree separation of L4 and L5 Lagrange points

Named after Joseph Louis Lagrange, who calculated points L4 and L5

Noun[edit]

Lagrange point (plural Lagrange points)

  1. (astrophysics) a point in an the orbital configuration of a two-body system where a small object affected only by gravity can theoretically be stationary relative to the two larger objects
    • 2013 July 28, Megan Gannon, “Spacecraft Sees Giant 'Hole' In the Sun”, news.yahoo.com, accessed on 2013-07-29:
      The $1.27-billion (1 billion euros) SOHO satellite was launched in 1995 and is flying a joint mission between NASA and the European Space Agency (ESA). It watches solar activity from an orbit about the Lagrange Point 1, a gravitationally stable spot between Earth and the sun that is about 932,000 miles (1.5 million kilometers) from our planet.
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