There is, however, a planet known to orbit backwards around its parent star.

然而，还有一颗绕着母星逆行的行星。

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The first is its location so close to its parent star. Second, despite its size, it is quite heavy.

首先是新行星的位置非常接近其所属恒星，其次，它虽小却相当沉重。

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When a planet transits its parent star, starlight passes through its atmosphere (if the planet has one).

一颗行星横越其母星时，星光会穿过其大气层(如果它有大气层的话)。

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But the method favours the detection of large planets orbiting close to its parent star.

BBC: Telescope sees smallest exoplanet

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

Its parent star is similar to the sun, again unlike those of the other two candidates, both of which orbit cooler, dimmer stars.

ECONOMIST: Another Earth?