This transformed our view not only of the solar system but also of the importance of sending a spacecraft to Pluto.

这不仅改变了我们对太阳系的认识，也使我们意识到向冥王星发射飞船的重要性。

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Of course, we now know that the planets, including Earth, revolve around the Sun, and that the solar system is only a tiny part of the universe.

当然，我们现在知道，包括地球在内的行星都围绕太阳公转，而太阳系只是宇宙的一小部分。

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For more than 300 years, we thought Saturn was the only body in the solar system with rings.

在300多年的时间里，我们一直认为土星是太阳系唯一拥有光环的天体。

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To date, of the roughly 800 planets catalogued beyond our Solar System, only four are known to orbit stars in a cluster.

BBC: 'Dirty' stars hint at Sun's future

Weather of a slightly more familiar kind is thought to exist on Titan, the largest satellite of Saturn and the only moon in the solar system to have a thick atmosphere.

ECONOMIST: Comparative meteorology

Prof Solomon said that what Messenger finds not only unlocks secrets about the innermost planet in our Solar System, but could also shed light on those of other planets.

BBC: Mercury's water ice at north pole finally proven