[天]行星系

binary system───[数]二进制

alarm system───[自]报警系统

binary systems───[数]二进制

entire system───整个系统

flawed system───有缺陷的系统

legal system───法律制度

meantone system───均音系

is quite a change from merely 20 years ago, when we knew for sure of just one planetary system: ours.───20年前相比，却已是天壤之别，当我们确切知道了这一行星体系：我们自身所处的行星体系。

It's not going to Jupiter. It's going to some other planetary system.───它不是去木星，而是去其他的星系。

It is reasonable to suppose that other stars are also attended by planetary system.───有理由猜测别的恒星也伴有行星系统.

PLANETRISE: In an artist's conception, rocky moons orbit a gas giant in a distant planetary system.───行星升起：在艺术家的想像图中，在一个遥远的行星系统内，一颗岩石卫星围绕一颗气体行星旋转。

Although studies of the interstellar medium do not depend on the precise choice of target star, the other scientific objectives clearly require that the target star has a planetary system.

For the first time, astronomers have detected a planetary system in a stellar stream of extragalactic origin.

And we're just now announcing the discovery of the fifth planet, the first planetary system with five full planets orbiting a sunlike star." Our solar system has eight planets.

All this is a transparent metaphor for the planetary system and the signs of the zodiac .

It is reasonable to suppose that other stars are also attended by planetary system.

Conversely, astrometry works best when a planetary system is "face-on" when seen from Earth, because then the star's movements in the orbital plane are most pronounced.

And we are just now announcing the discovery of the fifth planet, the first planetary system with 5 full planets orbiting a sunlike star.

The important reason of Copernicus planetary system replacing the Ptolemaic theory lies in that the former has more empirical succinctness than the latter.