We’ve found a planet which fits Earth’s profile afte finding 200 or so which have been Jupiter planets at Mercury distances. In fact that is pretty much all we can usually detect is massive planets close to a star. This means that odds are there are hundreds of thousands of Earth like planets within a 100 light years. The other thing this means is that our space efforts should be focused on getting ships up to relativistic speeds so that we can find out what is going on in that planet. The other thing this planet’s discovery implies is that the chances of a planet being able to support life are far better than some people have supposed. It also means that alien life is all he more likely.