It involves pointing a radio receiver at a candidate star (one that is sunlike and not too far away) and listening for some sort of steady signal - an alien radio broadcast, on all the time.
它涉及到指出电台接收器在候选星体(像太阳一样的星体)，监听各种稳定的信号，外星人广播，全时段的。
2
Astronomers detected a bright fluorescent signal, caused by radiation from the nearby star being absorbed by methane and released as light.
天文学家探测到了强荧光信号，该信号来源于甲烷气体吸收附近恒星辐射而发出的光线。
3
Moreover, because the universe is so vast, it takes years for a signal travelling at the speed of light to reach only as far as the next star to our sun.