Lagrange point

English

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

Alternative forms

• (astrophysics): Lagrangian point

Etymology

60-degree separation of L4 and L5 Lagrange points

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

Noun

Lagrange point (plural Lagrange points)

1. (astrophysics) a point in an 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”, in news.yahoo.com‎^[1], retrieved 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.

Translations

a point in an orbital configuration

• Arabic: نُقْطَة لَاغْرَانْج f (nuqṭat laḡranj)
• Chinese:

  Mandarin: 拉格朗日點／拉格朗日点 (lāgélǎngrìdiǎn), 拉格朗日点 (Lāgélǎngrì diǎn)

• French: point de Lagrange (fr) m
• German: Lagrange-Punkt m
• Japanese: ラグランジュ点 (Raguranju-ten)
• (deprecated template usage) {{trans-mid}}
• Korean: 라그랑주점 (Rageurangju-jeom)
• Persian: نقطه لاگرانژی (noqte-ye lâgrânži)
• Russian: то́чка Лагра́нжа f (tóčka Lagránža)
• Spanish: punto de Lagrange m
• Vietnamese: điểm Lagrange

Synonyms

• (astrophysics): L-point

Hyponyms

• (astrophysics): Trojan point

Hypernyms

• (astrophysics): libration point

Derived terms

• (astrophysics): Lagrangian, Lagrangian asteroid, Lagrangian moon, Lagrangian planet

Related terms

• (astrophysics): L1, L2, L3, L4, L5

See also

• (astrophysics): barycenter