7 earth sized planets discovered nearby

http://www.cnn.com/2017/02/22/world/new-exoplanets-discovery-nasa/

At only 40 light years away, is it curious to anyone why we’re just now finding about about these planets? Or perhaps are they moving through our solar system (circular) and are now making yet another approach at us? If so, the gravitational pull of these planets will cause earth to tilt, heat up, expand and cause any number of other natural disasters.