Kipping hasn't put his method into practice yet, since no star is known to have both a planet and moon that transit.

基平并没有付诸实施他的方法不过，因为没有已知的恒星是一颗行星都和月亮，过境。

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It does so by watching for small diminutions in the amount of light from a star as the planet in question passes in front of it, a phenomenon known technically as a transit.

当被观测行星从恒星前经过时，CoRoT号就观察来自恒星的光的细微减少，这种现象在天文术语中叫做过境。

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Kipping hasn't put his method into practice yet, since no star is known to have both a planet and moon that transit. However, NASA's Kepler spacecraft should discover several such systems.

由于还没有发现任何恒星同时有行星和其卫星凌日，Kipping并没有把他的方法运用于实际。但是，NASA的开普勒号航空飞船会在将来发现一些这样的系统。

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But if the planet's orbit is nearly edge-on, as viewed from Earth, then the planet will transit its parent star.

ECONOMIST: Transits of Venus

During such a transit, the observed brightness of the star drops slightly because the planet blocks a part of the starlight.

BBC: New robotic telescope in Chile set for planet hunt

Telescopes such as Kepler search for planets as they transit, or cross in front of, their star, causing telltale dips in the star's brightness.

MSN: News editor