HELLO FROM EARTH Update... As of 7 PM California time tonight (12 PM Sydney time on Friday, October 2), it has been four weeks since a radio signal containing 25,880 goodwill text messages—including one by me—(though the Hello From Earth website now lists 25,878 messages on its front page. Odd) was transmitted to the exoplanet Gliese 581d from a giant antenna in Australia. The signal is now 562 billion miles (904 billion kilometers) from Earth.
Even though this radio signal is suppose to last around 10,000 years, I wonder how weak it’s gotten since NASA transmitted the signal from its Canberra Deep Space Communications Complex 35 days ago? Obviously, not very weak. Though there should be some slight background noise in the signal by now... Oh well.
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