What could go wrong?...This is insane and these astronomers should not take it upon themselves to attempt any contact with possible intelligent alien life without the approval of the governments of the world...They are essentially speaking for the human race on earth when sending signals like this and it could have very disastrous consequences if they contact aggressive alien species...This is a very foolish and ignorant act they have done and put all of humanity at serious risk...They may have sealed the fate of future generations... What could possibly go wrong? Astronomers send a message to two potentially habitable planets 12 light years away - and if aliens see it, they could respond by 2042 Scientists beamed a message towards GJ 273, a red dwarf star, last month The star was chosen as it is known to host two potentially habitable planet The message included a science and maths 'tutorial' and 33 musical excerpts But not everyone is convinced by the plan, with experts including Professor Stephen Hawking, warning that if aliens discovered us, it could 'end life on Earth' SHOULD WE BE WARY OF ALIENS? If there are any intelligent alien life forms out there, Stephen Hawking thinks we're playing a dangerous game by trying to contact them. The physicist believes if aliens discovered Earth, they are likely to want to conquer and colonise our planet. 'If aliens visit us, the outcome could be much like when Columbus landed in America, which didn't turn out well for the Native Americans,' he said in an interview. But co-founder and former director of the Seti Institute, Jill Tarter, doesn't think this will be the case. She argues any aliens who have managed to travel across the universe will be sophisticated enough to be friendly and peaceful. 'The idea of a civilisation which has managed to survive far longer than we have...and the fact that that technology remains an aggressive one, to me, doesn't make sense,' she said.