Messages from Earth will be sent into space as part of National Science Week. People can visit the Hello From Earth website to post text-like message that will be transmitted to Gliese 581d - the nearest earth-like planet outside our solar system. Gliese 581d was discovered in April 2007. It is eight times the size of Earth and 20 light years away. The project is already proving popular, with the website receiving 26,000 hits in the first five minutes - crashing the system for a short time. The messages will be sent from the Canberra Deep Space Complex at Tidbinbilla....