The picture shows six of the nine planets in the solar system.

这张图片展示太阳系9个行星中的6个行星。

《柯林斯英汉双解大词典》

What mysteries do you know about the nine planets in the solar system?

关于太阳系里的九大行星，你知道哪些奥秘？

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Nine beads totem is nine dots totem, a symbol of nature, the nine planets running.

九眼天珠的图腾就是九个圆点图腾，象征自然界九大行星运转。

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Pluto is the last of the nine familiar planets to be visited by a spacecraft and the program made a major discovery even before leaving the ground.

NPR: NASA Sends Spacecraft to Pluto

First, its orbit appears to run in the opposite direction from those of the nine known planets.

ECONOMIST: X marks the spot

"Make no mistake about it, " said Geoffrey Marcy of San Francisco State University, who has helped find nine of the 12 planets discovered since 1995.

CNN: Astronomers spy new neighbors outside solar system