Wed, Aug 27, 2008
Aero-Terms are designed to be a daily reminder of the terms,
names, acronyms and explanations of the unique language that
populates the aviation world. Aerospace, sport aviation, fixed
wing, helo, you name it... it's all fair game.
Aero-Terms should serve as a quick but intriguing reminder of
the terms you may use every day, or an introduction to an aspects
of the Aero-World you may not yet be familiar with. ANN also
encourages readers to go beyond the FMI link, and further research
any intriguing terms.
Suggestions for future Aero-Terms are ALWAYS
welcome, as are additions or discussion of the
explanations given for each Aero-Term.
In a system dominated by two attracting bodies (such as Sun and
Earth), a point at which a third, much smaller body (such as a
satellite) keeps the same position relative to the other two.
Theoretically, the Sun-Earth system has 5 Lagrangian points, but
only two are important: L1, on the sunward side of Earth, about 4
times the distance of the Moon, and L2 at approximately the same
distance on the midnight side. The only two lagrangian stable
points, L4 and L5, lie in the orbit of the primary body, leading
and trailing it by a 60-degree arc. Jupiter's trojan asteroids can
be found orbiting around the Jupiter-Sun L4 and L5 points.
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