I found your link, and I shall give it to you in 3 seconds ...

From the Pointless Comparison Collection: To give you an idea of how sensitive these antennas are, if we were to "listen" to one spacecraft in the outer solar system by Jupiter or Saturn for 1 billion years and add up all the signal we collected, it would be enough power to set off the flash bulb on your camera once. -- Peter Doms, manager of the Deep Space Network systems program at JPL