The orbits of Mercury, Venus, Earth, Mars, Jupiter and Saturn fit neatly into this pattern; Uranus, discovered in 1781, also obeyed the law.

水星、金星、地球、火星、木星和土星的轨道恰好符合这种模式；1781年发现的天王星也同样符合该定律。

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The nearly circular orbits of planets in our solar system led scientists to expect that planets around other stars would also reside in circular orbits.

在我们的太阳系中，行星的轨道几乎是圆形的，这使得科学家们预测，其他恒星周围的行星也会位于圆形轨道上。

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Dr Bottke has been tracking the orbits of asteroids.

伯克(Bottke)博士一直在追踪小行星的运行轨迹。

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The American space agency's Dawn spacecraft began circling Vesta, a member of the asteroid belt that orbits the sun.

VOA: special.2011.07.27

The existence of Neptune was deduced from minute deviations between the predicted and observed orbits of Uranus.

ECONOMIST: A space oddity

The simulations also showed that rocky planets known as Hot Earths often form inside the orbits of Hot Jupiters.

BBC: NEWS | Science/Nature | Earth-like planets may be common

The data are the orbits of comets that are likely to have been first-time visitors to the inner solar system.

ECONOMIST: X marks the spot