star transit

常见例句

They made their observations as the planet passed in front of its parent star in what is called a transit.
HD 189733b从其主恒星前面经过时，即发生所谓的凌日现象时，科学家们进行了观察。
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To examine an alien planet'satmosphere, the planet concerned must transit its parent star in the line ofsight from Earth.
只有当地外行星从它的母恒星表面掠过，且在地球上可观测到时，才能对该行星的大气层进行检测。
Because they are both large and close they are easier to detect from their gravitational effect on their stars and also more likely to transit the disc of the star.
因此“热木星”必然在离它们主恒星很远的地方形成（其组成物质在远离主恒星的外围），然后向内部迁移，最终在非常接近其主恒星的轨道上运行。许多天文学家认为，这是由形成“热木星”的星尘圆盘与其主恒星的引力相互作用造成的。

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
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
Kepler flags exoplanet candidates via the transit method, which looks for dips in a star's brightness caused by an object crossing in front of it.
MSN: Kepler telescope adds 41 planets to its list - Technology & science - Space - Space.com NBC News