星际的英文：
interstellar
interplanetary

methane may have extraterrestrial significance
甲烷具有星际意义。

The cosmic rocket carrying an automatic interplanetary station snot off into cosmic space.
宇宙火箭带着自动星际站飞快冲向宇宙空间。

The solar wind does not impinge directly on the earth and its atmosphere, however.
太阳风一直向外吹，直到碰到星际中的离子或电中性气体。

Space exploration
星际探索

Star Communicator
星际通讯战

interplanetary exploration
行星际空间探测

guidance and control of interplanetary flight
星际航行导航和控制

They were interested in the heat capacity of interstellar gases.
他们感兴趣的是星际气体的热容量。

planetary and interplanetary probe
行星和行星际探测器

an interplanetary journey in a space ship
乘太空船作星际旅行

They were interested in the heat capacity of interstellar gases.
他们感兴趣的是星际气体的热容量。

Collapsing interstellar cloud reverses its gravitational infall and expands outward into the relatively quiescent interstellar environment
坍缩的星际云克服向内的引力而向外膨胀到较宁静的星际环境中去。

Molecular clouds play an integral role in the prestellar evolutionary sequence of interstellar matter
分子云在星际物质的星前期演化序列中起着不可缺少的作用。

Stars condense from the matter scattered thinly through interstellar space
恒星是由疏散在星际空间的物质凝聚而成的。

The paramount task here facing observational astronomy is to study real interstellar clouds.
实测天文学在这里所面临的头等任务是研究实际的星际云。

The remnant nebular gas pervades the interplanetary space
星云的残余气体充斥星际空间。

The cosmic rocket carrying an automatic interplanetary station snot off into cosmic space.
宇宙火箭带着自动星际站飞快冲向宇宙空间。

Either of two unmanned U.S. interplanetary probes launched in 1977 to gather information about the Sun's outer planets.
美国1977年进行太空探测的两枚不载人星际探测器，其发射目的是观察外行星系。

Voyager: Either of two unmanned U.S. interplanetary probes launched in 1977 to gather information about the Sun's outer planets.
旅行者号:美国1977年进行太空探测的两枚不载人星际探测器，其发射目的是观察外行星系。

In other interplanetary explorations without astronauts, Mariner 10 spacecraft three times passed by Mercury, the planet closest to the sun, revealing its similarity to both the earth and the moon.
其它无人驾驶的星际探险，主要有水手号太空船三次经过最靠近太阳的行星水星，揭示出水星与月球，地球的相同点。