也包括电视卫星接受器。如果他们了解外星人要做什么，很多人听到天空中一个区域里不同的声音，在数年之内，甚至有可能接收到遥远的世界里外星生物的信号。
If they're right about what ET would do, so many people listening to so rich a region of the sky might even pick up the telltale signal of intelligent life on a distant world within a few years.
2009年11月22号，绕地卫星上的热发射和反射接受器捕捉到了这种蓝绿细丝状水藻旋转越过危地马拉的亚提特兰湖。
Terra's ASTER sensor captured this view of filaments of blue-green algae swirling across Guatemala's Lake Atitlán on November 22, 2009.
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