Think you mean a Lagrange libration point,
one where gravitational forces are equal
and keep a station in approximately the same position without fuel.
But these were meant specifically relative to Earth and Moon, not in general.
L5 is the fifth Lagrangian Libration point. But what are libration points? They are locations where a spacecraft may be placed so as always to remain in the same position with respect to the Earth and the Moon.
>From http://www.l5news.org/L5whatis.htm :
The French mathematician, Lagrange, in 1772, showed that there are five such points. Three of them lie on a line connecting the Earth and Moon; these are L1, L2, and L3. They are unstable; a body placed there and moved slightly will tend to move away, though it will not usually crash directly onto the Earth or Moon. The other two are L4 and L5. They lie at equal distance from Earth and Moon, in the Moon's orbit, thus forming equilateral triangles with Earth and Moon. The Sun is in the picture, and it disturbs the orbits of spacecraft and colonies. It turns out (from an extremely messy calculation done only in 1968) that with the Sun in the picture, a colony could be placed not directly at L4 or L5, but rather in an orbit around one of these points. The orbit keeps the colony about 90,000 miles from its central libration point.
-Ben
>>How about this...
>>
>>Lets fix the problems in the United States first before we to go the Moon
>>and destroy that also.
>
>
>What's there to destroy. I suggest that we move all the heavy
>polluting industries and most of the resource extraction sector to
>outer space. There are enough mineral resources in the asteroid belt
>to last us at current rates (and double the current rate according to
>some) to last us at least 10,000 years.
>
>I love the idea of an O'Neil colony orbiting an L5 point near
>Jupiter. That would truly be way cool.
>
>larry
>
>--
>
>Larry C. Lyons
>
>========================================================
>Life is Complex. It has both real and imaginary parts.
>========================================================
>Chaos, Panic and Disorder. My work here is done.
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