2.4 times the size of Earth, and the team does not yet know if Kepler 22-b is made mostly of rock, gas or liquid.
Sounds a strange "twin".
Byt yes, sooner or later, probably sooner, we should find a planet we can live on. Only problem then is getting there before it becomes inhospitable. (Or occupied.)
Now we know another Earth like planet exists I wonder what form of communication we would use to contact them. Years ago we sent a spaceship into deep space with hyroglyphics imprinted on a tablet but this time we could finely tune our search. Would it be radio waves or what?
That planet is 600 ly away so if there are creatures on it that have advanced to the required technological level then a signal sent from Earth now would take 600 years to reach them, followed by a further 600 years to get a reply. If they have already picked up radio signals generated by humans then we only have another 500 years to wait to receive a reply, if that is what they choose to do.
But too little info is known about that planet to assume that conditions on it are conducive to the development of even the most primitive of lifeforms.
This would make a good project for the techies of AB...How to communicate with some form of primordial slime ( the other extreme doesn't bear thinking about). Peferably using some form of faster than light energy so that we get a reply whilst human civilisation still exists. My first suggestion is a visit to R&S where there are people who have paranormal abilities(yes really).