Caption:: Interplanetary unmanned spacecrafts are distant and their signals are very weak. Using radio antennae, the Deep Space Network was set up for the interplanetary telecommunications.

• 在行星际空间航行的无人探测船，距离遥远，讯号微弱。由多台巨型碟型天线组成的深空网络因此建立，以作行星际的电信往来。