行星

Asteroids, also known as " minor planets ", are numerous in the outer space.

小行星, 亦称为 “ 小型行星 ”, 在外太空中不计其数.

Is there life on other planets?

在其他行星上有生命 吗 ?

The new planet is about ten times the size of the earth.

新发现的行星大约是地球的10倍那么大。

the planet Earth

地球这颗行星

In 1664 Hooke observed a reddish spot on the surface of the planet.

1664年，胡克注意到这颗行星表面有一块微红的斑点。

The planet is probably in orbit around a small star.

这颗行星可能正环绕着一颗小恒星运行。

It is probably easier to make an analogy between the courses of the planets, and two trains travelling in the same direction.

将行星的运行比作两列火车朝同一方向行驶可能更容易些。

The ability to do this will be necessary in future flights to distant planets.

将来飞往遥远的行星时,需要这样的能力.

The name Vulcan was given to the undiscovered planet.

一颗不为人知的行星被命名为“祝融”。

Which planets can sustain life?

哪些行星可以维持生命的存在？

Does life exist on other planets?

别的星球上存在生命吗?

The newly discovered world followed an orbital path unlike that of any other planet.

新发现的这个天体具有不同于任何其他行星的运行轨道。

Small meteorites have left impact craters all over the planet's surface.

这个行星的表面布满了小块陨石留下的撞击坑.

Long long ago, we knew the periodic motion of a planet.

很久以前, 我们就知道行星的周期运动.

Travel through space to other planets interests many people today.

现在很多人对去宇宙中其它行星旅行感兴趣.