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- ...Stability|Halo orbit]] at the L<sub>1</sub> and the [[Advanced Composition Explorer]] (ACE) is in a [[Lissajous]] orbit, also at the L<sub>1</sub> point. The E | [[Advanced Composition Explorer|Advanced Composition Explorer (ACE)]] || <div style="text-align:center;">L<sub>1</sub></div>21 KB (3,518 words) - 16:42, 19 June 2007
