In 1997, they saw evidence of planets near other stars like the sun.

1997年，他们发现了太阳等其他恒星附近有行星存在的证据。

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Do economics and finance work in the same way as weather conditions or the movement of planets?

经济和金融的运作方式与天气条件或行星的运行相同吗？

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Astronomers suspect that pairs of planets also engage in this slingshot activity, leaving them in disturbed, elliptical orbits.

天文学家怀疑成对的行星也参与了这种弹弓活动，使它们处于不规则的椭圆轨道上。

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They also are home to an untold number of planets.

VOA: special.2009.01.20

Look, take the argument of the planets, the Morning Star and the Evening Star example.

拿行星的论证,晨星和昏星的那个例子来说

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By putting the two together, out comes the elliptical motion of the planets.

将这两个式子联立,就得到了行星作椭圆运动的方程

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That plethora allows astronomers to start drawing conclusions about how common various sorts of planets are.

ECONOMIST: Another Earth?

This could change once future planet-hunting instruments have provided the first images of planets around other stars.

ECONOMIST: Twinkle, twinkle, giant planet

But these are the first images of planets outside the Solar System, or exoplanets as they are called.

ECONOMIST: Planets are seen outside the Solar System