It is long known that Earth's orbit around the Sun changes periodically, cyclically affecting the way solar radiation strikes the Earth.

人们早就知道，地球围绕太阳的轨道会周期性地变化，周期性地影响太阳辐射照射地球的方式。

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Mars's orbit around the Sun is the fourth fastest orbit of all the solar system planets.

在太阳系所有行星中，火星绕太阳的轨道速度第四快。

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The reason for a leap day or a leap year is because our calendar does not follow the Earth's orbit around the sun exactly.

闰日或闰年出现的原因是我们的历法并不精确地遵循地球围绕太阳运行的轨道。

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In 1960, at Cape Canaveral, Pioneer V was launched into orbit around the sun.

CNN: Wednesday,

To reconstruct the meteor's original orbit around the Sun, they used six different properties of its trajectory through Earth's atmosphere.

BBC: Russia meteor's origin tracked down

Using amateur video footage, they were able to plot the meteor's trajectory through Earth's atmosphere and then reconstruct its orbit around the Sun.

BBC: Russia meteor's origin tracked down